feat: Load custom themes from config storage

go.mod

@@ -3,43 +3,47 @@ module github.com/unfunco/t
 go 1.25
 
 require (
+	charm.land/lipgloss/v2 v2.0.0-beta.3.0.20251106193318-19329a3e8410
 	github.com/MakeNowJust/heredoc/v2 v2.0.1
 	github.com/charmbracelet/bubbles v0.21.0
 	github.com/charmbracelet/bubbletea v1.3.10
-	github.com/charmbracelet/fang v0.4.3
+	github.com/charmbracelet/fang v0.4.4
 	github.com/charmbracelet/lipgloss v1.1.0
-	github.com/charmbracelet/lipgloss/v2 v2.0.0-beta.3.0.20250917201909-41ff0bf215ea
 	github.com/spf13/cobra v1.10.1
 )
 
 require (
 	github.com/atotto/clipboard v0.1.4 // indirect
 	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
-	github.com/charmbracelet/colorprofile v0.3.2 // indirect
-	github.com/charmbracelet/ultraviolet v0.0.0-20250915111650-81d4262876ef // indirect
-	github.com/charmbracelet/x/ansi v0.10.1 // indirect
-	github.com/charmbracelet/x/cellbuf v0.0.13 // indirect
-	github.com/charmbracelet/x/exp/charmtone v0.0.0-20250603201427-c31516f43444 // indirect
-	github.com/charmbracelet/x/term v0.2.1 // indirect
+	github.com/charmbracelet/colorprofile v0.3.3 // indirect
+	github.com/charmbracelet/ultraviolet v0.0.0-20251114211333-9deacb990ee7 // indirect
+	github.com/charmbracelet/x/ansi v0.11.1 // indirect
+	github.com/charmbracelet/x/cellbuf v0.0.14 // indirect
+	github.com/charmbracelet/x/exp/charmtone v0.0.0-20251114205511-64e30b5ee1c5 // indirect
+	github.com/charmbracelet/x/exp/color v0.0.0-20251006100439-2151805163c8 // indirect
+	github.com/charmbracelet/x/term v0.2.2 // indirect
 	github.com/charmbracelet/x/termios v0.1.1 // indirect
 	github.com/charmbracelet/x/windows v0.2.2 // indirect
+	github.com/clipperhouse/displaywidth v0.5.0 // indirect
+	github.com/clipperhouse/stringish v0.1.1 // indirect
+	github.com/clipperhouse/uax29/v2 v2.3.0 // indirect
 	github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/lucasb-eyer/go-colorful v1.3.0 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/mattn/go-localereader v0.0.1 // indirect
-	github.com/mattn/go-runewidth v0.0.16 // indirect
+	github.com/mattn/go-runewidth v0.0.19 // indirect
 	github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 // indirect
 	github.com/muesli/cancelreader v0.2.2 // indirect
-	github.com/muesli/mango v0.1.0 // indirect
-	github.com/muesli/mango-cobra v1.2.0 // indirect
-	github.com/muesli/mango-pflag v0.1.0 // indirect
+	github.com/muesli/mango v0.2.0 // indirect
+	github.com/muesli/mango-cobra v1.3.0 // indirect
+	github.com/muesli/mango-pflag v0.2.0 // indirect
 	github.com/muesli/roff v0.1.0 // indirect
 	github.com/muesli/termenv v0.16.0 // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
-	github.com/spf13/pflag v1.0.9 // indirect
+	github.com/spf13/pflag v1.0.10 // indirect
 	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
-	golang.org/x/sync v0.17.0 // indirect
-	golang.org/x/sys v0.36.0 // indirect
-	golang.org/x/text v0.24.0 // indirect
+	golang.org/x/sync v0.18.0 // indirect
+	golang.org/x/sys v0.38.0 // indirect
+	golang.org/x/text v0.31.0 // indirect
 )

go.sum

@@ -1,3 +1,5 @@
+charm.land/lipgloss/v2 v2.0.0-beta.3.0.20251106193318-19329a3e8410 h1:D9PbaszZYpB4nj+d6HTWr1onlmlyuGVNfL9gAi8iB3k=
+charm.land/lipgloss/v2 v2.0.0-beta.3.0.20251106193318-19329a3e8410/go.mod h1:1qZyvvVCenJO2M1ac2mX0yyiIZJoZmDM4DG4s0udJkU=
 github.com/MakeNowJust/heredoc v1.0.0 h1:cXCdzVdstXyiTqTvfqk9SDHpKNjxuom+DOlyEeQ4pzQ=
 github.com/MakeNowJust/heredoc v1.0.0/go.mod h1:mG5amYoWBHf8vpLOuehzbGGw0EHxpZZ6lCpQ4fNJ8LE=
 github.com/MakeNowJust/heredoc/v2 v2.0.1 h1:rlCHh70XXXv7toz95ajQWOWQnN4WNLt0TdpZYIR/J6A=
@@ -6,36 +8,42 @@ github.com/atotto/clipboard v0.1.4 h1:EH0zSVneZPSuFR11BlR9YppQTVDbh5+16AmcJi4g1z
 github.com/atotto/clipboard v0.1.4/go.mod h1:ZY9tmq7sm5xIbd9bOK4onWV4S6X0u6GY7Vn0Yu86PYI=
 github.com/aymanbagabas/go-osc52/v2 v2.0.1 h1:HwpRHbFMcZLEVr42D4p7XBqjyuxQH5SMiErDT4WkJ2k=
 github.com/aymanbagabas/go-osc52/v2 v2.0.1/go.mod h1:uYgXzlJ7ZpABp8OJ+exZzJJhRNQ2ASbcXHWsFqH8hp8=
-github.com/aymanbagabas/go-udiff v0.2.0 h1:TK0fH4MteXUDspT88n8CKzvK0X9O2xu9yQjWpi6yML8=
-github.com/aymanbagabas/go-udiff v0.2.0/go.mod h1:RE4Ex0qsGkTAJoQdQQCA0uG+nAzJO/pI/QwceO5fgrA=
+github.com/aymanbagabas/go-udiff v0.3.1 h1:LV+qyBQ2pqe0u42ZsUEtPiCaUoqgA9gYRDs3vj1nolY=
+github.com/aymanbagabas/go-udiff v0.3.1/go.mod h1:G0fsKmG+P6ylD0r6N/KgQD/nWzgfnl8ZBcNLgcbrw8E=
 github.com/charmbracelet/bubbles v0.21.0 h1:9TdC97SdRVg/1aaXNVWfFH3nnLAwOXr8Fn6u6mfQdFs=
 github.com/charmbracelet/bubbles v0.21.0/go.mod h1:HF+v6QUR4HkEpz62dx7ym2xc71/KBHg+zKwJtMw+qtg=
 github.com/charmbracelet/bubbletea v1.3.10 h1:otUDHWMMzQSB0Pkc87rm691KZ3SWa4KUlvF9nRvCICw=
 github.com/charmbracelet/bubbletea v1.3.10/go.mod h1:ORQfo0fk8U+po9VaNvnV95UPWA1BitP1E0N6xJPlHr4=
-github.com/charmbracelet/colorprofile v0.3.2 h1:9J27WdztfJQVAQKX2WOlSSRB+5gaKqqITmrvb1uTIiI=
-github.com/charmbracelet/colorprofile v0.3.2/go.mod h1:mTD5XzNeWHj8oqHb+S1bssQb7vIHbepiebQ2kPKVKbI=
-github.com/charmbracelet/fang v0.4.3 h1:qXeMxnL4H6mSKBUhDefHu8NfikFbP/MBNTfqTrXvzmY=
-github.com/charmbracelet/fang v0.4.3/go.mod h1:wHJKQYO5ReYsxx+yZl+skDtrlKO/4LLEQ6EXsdHhRhg=
+github.com/charmbracelet/colorprofile v0.3.3 h1:DjJzJtLP6/NZ8p7Cgjno0CKGr7wwRJGxWUwh2IyhfAI=
+github.com/charmbracelet/colorprofile v0.3.3/go.mod h1:nB1FugsAbzq284eJcjfah2nhdSLppN2NqvfotkfRYP4=
+github.com/charmbracelet/fang v0.4.4 h1:G4qKxF6or/eTPgmAolwPuRNyuci3hTUGGX1rj1YkHJY=
+github.com/charmbracelet/fang v0.4.4/go.mod h1:P5/DNb9DddQ0Z0dbc0P3ol4/ix5Po7Ofr2KMBfAqoCo=
 github.com/charmbracelet/lipgloss v1.1.0 h1:vYXsiLHVkK7fp74RkV7b2kq9+zDLoEU4MZoFqR/noCY=
 github.com/charmbracelet/lipgloss v1.1.0/go.mod h1:/6Q8FR2o+kj8rz4Dq0zQc3vYf7X+B0binUUBwA0aL30=
-github.com/charmbracelet/lipgloss/v2 v2.0.0-beta.3.0.20250917201909-41ff0bf215ea h1:g1HfUgSMvye8mgecMD1mPscpt+pzJoDEiSA+p2QXzdQ=
-github.com/charmbracelet/lipgloss/v2 v2.0.0-beta.3.0.20250917201909-41ff0bf215ea/go.mod h1:ngHerf1JLJXBrDXdphn5gFrBPriCL437uwukd5c93pM=
-github.com/charmbracelet/ultraviolet v0.0.0-20250915111650-81d4262876ef h1:VrWaUi2LXYLjfjCHowdSOEc6dQ9Ro14KY7Bw4IWd19M=
-github.com/charmbracelet/ultraviolet v0.0.0-20250915111650-81d4262876ef/go.mod h1:AThRsQH1t+dfyOKIwXRoJBniYFQUkUpQq4paheHMc2o=
-github.com/charmbracelet/x/ansi v0.10.1 h1:rL3Koar5XvX0pHGfovN03f5cxLbCF2YvLeyz7D2jVDQ=
-github.com/charmbracelet/x/ansi v0.10.1/go.mod h1:3RQDQ6lDnROptfpWuUVIUG64bD2g2BgntdxH0Ya5TeE=
-github.com/charmbracelet/x/cellbuf v0.0.13 h1:/KBBKHuVRbq1lYx5BzEHBAFBP8VcQzJejZ/IA3iR28k=
-github.com/charmbracelet/x/cellbuf v0.0.13/go.mod h1:xe0nKWGd3eJgtqZRaN9RjMtK7xUYchjzPr7q6kcvCCs=
-github.com/charmbracelet/x/exp/charmtone v0.0.0-20250603201427-c31516f43444 h1:IJDiTgVE56gkAGfq0lBEloWgkXMk4hl/bmuPoicI4R0=
-github.com/charmbracelet/x/exp/charmtone v0.0.0-20250603201427-c31516f43444/go.mod h1:T9jr8CzFpjhFVHjNjKwbAD7KwBNyFnj2pntAO7F2zw0=
-github.com/charmbracelet/x/exp/golden v0.0.0-20241011142426-46044092ad91 h1:payRxjMjKgx2PaCWLZ4p3ro9y97+TVLZNaRZgJwSVDQ=
-github.com/charmbracelet/x/exp/golden v0.0.0-20241011142426-46044092ad91/go.mod h1:wDlXFlCrmJ8J+swcL/MnGUuYnqgQdW9rhSD61oNMb6U=
-github.com/charmbracelet/x/term v0.2.1 h1:AQeHeLZ1OqSXhrAWpYUtZyX1T3zVxfpZuEQMIQaGIAQ=
-github.com/charmbracelet/x/term v0.2.1/go.mod h1:oQ4enTYFV7QN4m0i9mzHrViD7TQKvNEEkHUMCmsxdUg=
+github.com/charmbracelet/ultraviolet v0.0.0-20251114211333-9deacb990ee7 h1:PeoXe8fG5yb6uaimw4Om9eiXL74MzFSwSj3coBtDPmY=
+github.com/charmbracelet/ultraviolet v0.0.0-20251114211333-9deacb990ee7/go.mod h1:6lfcr3MNP+kZR25sF1nQwJFuQnNYBlFy3PGX5rvslXc=
+github.com/charmbracelet/x/ansi v0.11.1 h1:iXAC8SyMQDJgtcz9Jnw+HU8WMEctHzoTAETIeA3JXMk=
+github.com/charmbracelet/x/ansi v0.11.1/go.mod h1:M49wjzpIujwPceJ+t5w3qh2i87+HRtHohgb5iTyepL0=
+github.com/charmbracelet/x/cellbuf v0.0.14 h1:iUEMryGyFTelKW3THW4+FfPgi4fkmKnnaLOXuc+/Kj4=
+github.com/charmbracelet/x/cellbuf v0.0.14/go.mod h1:P447lJl49ywBbil/KjCk2HexGh4tEY9LH0/1QrZZ9rA=
+github.com/charmbracelet/x/exp/charmtone v0.0.0-20251114205511-64e30b5ee1c5 h1:hB4cwUAX4XX7BFsk9OU/Kxhg7UFkvAIVI/6KKzK9o30=
+github.com/charmbracelet/x/exp/charmtone v0.0.0-20251114205511-64e30b5ee1c5/go.mod h1:URW1lCfdUqp9aey3HTV+jRvaGLuaj2d0jVk2NTRpklY=
+github.com/charmbracelet/x/exp/color v0.0.0-20251006100439-2151805163c8 h1:X5wanVZ1RmBfIQFuIp4trGdL1F6eGYL7ekJaK47e6V4=
+github.com/charmbracelet/x/exp/color v0.0.0-20251006100439-2151805163c8/go.mod h1:Fq7bG2T217JwA21s/gGh/uCMT5++zGDCt8l0MvbRxcA=
+github.com/charmbracelet/x/exp/golden v0.0.0-20250806222409-83e3a29d542f h1:pk6gmGpCE7F3FcjaOEKYriCvpmIN4+6OS/RD0vm4uIA=
+github.com/charmbracelet/x/exp/golden v0.0.0-20250806222409-83e3a29d542f/go.mod h1:IfZAMTHB6XkZSeXUqriemErjAWCCzT0LwjKFYCZyw0I=
+github.com/charmbracelet/x/term v0.2.2 h1:xVRT/S2ZcKdhhOuSP4t5cLi5o+JxklsoEObBSgfgZRk=
+github.com/charmbracelet/x/term v0.2.2/go.mod h1:kF8CY5RddLWrsgVwpw4kAa6TESp6EB5y3uxGLeCqzAI=
 github.com/charmbracelet/x/termios v0.1.1 h1:o3Q2bT8eqzGnGPOYheoYS8eEleT5ZVNYNy8JawjaNZY=
 github.com/charmbracelet/x/termios v0.1.1/go.mod h1:rB7fnv1TgOPOyyKRJ9o+AsTU/vK5WHJ2ivHeut/Pcwo=
 github.com/charmbracelet/x/windows v0.2.2 h1:IofanmuvaxnKHuV04sC0eBy/smG6kIKrWG2/jYn2GuM=
 github.com/charmbracelet/x/windows v0.2.2/go.mod h1:/8XtdKZzedat74NQFn0NGlGL4soHB0YQZrETF96h75k=
+github.com/clipperhouse/displaywidth v0.5.0 h1:AIG5vQaSL2EKqzt0M9JMnvNxOCRTKUc4vUnLWGgP89I=
+github.com/clipperhouse/displaywidth v0.5.0/go.mod h1:R+kHuzaYWFkTm7xoMmK1lFydbci4X2CicfbGstSGg0o=
+github.com/clipperhouse/stringish v0.1.1 h1:+NSqMOr3GR6k1FdRhhnXrLfztGzuG+VuFDfatpWHKCs=
+github.com/clipperhouse/stringish v0.1.1/go.mod h1:v/WhFtE1q0ovMta2+m+UbpZ+2/HEXNWYXQgCt4hdOzA=
+github.com/clipperhouse/uax29/v2 v2.3.0 h1:SNdx9DVUqMoBuBoW3iLOj4FQv3dN5mDtuqwuhIGpJy4=
+github.com/clipperhouse/uax29/v2 v2.3.0/go.mod h1:Wn1g7MK6OoeDT0vL+Q0SQLDz/KpfsVRgg6W7ihQeh4g=
 github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -49,46 +57,46 @@ github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWE
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/mattn/go-localereader v0.0.1 h1:ygSAOl7ZXTx4RdPYinUpg6W99U8jWvWi9Ye2JC/oIi4=
 github.com/mattn/go-localereader v0.0.1/go.mod h1:8fBrzywKY7BI3czFoHkuzRoWE9C+EiG4R1k4Cjx5p88=
-github.com/mattn/go-runewidth v0.0.16 h1:E5ScNMtiwvlvB5paMFdw9p4kSQzbXFikJ5SQO6TULQc=
-github.com/mattn/go-runewidth v0.0.16/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
+github.com/mattn/go-runewidth v0.0.19 h1:v++JhqYnZuu5jSKrk9RbgF5v4CGUjqRfBm05byFGLdw=
+github.com/mattn/go-runewidth v0.0.19/go.mod h1:XBkDxAl56ILZc9knddidhrOlY5R/pDhgLpndooCuJAs=
 github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 h1:ZK8zHtRHOkbHy6Mmr5D264iyp3TiX5OmNcI5cIARiQI=
 github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6/go.mod h1:CJlz5H+gyd6CUWT45Oy4q24RdLyn7Md9Vj2/ldJBSIo=
 github.com/muesli/cancelreader v0.2.2 h1:3I4Kt4BQjOR54NavqnDogx/MIoWBFa0StPA8ELUXHmA=
 github.com/muesli/cancelreader v0.2.2/go.mod h1:3XuTXfFS2VjM+HTLZY9Ak0l6eUKfijIfMUZ4EgX0QYo=
-github.com/muesli/mango v0.1.0 h1:DZQK45d2gGbql1arsYA4vfg4d7I9Hfx5rX/GCmzsAvI=
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 github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
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-github.com/spf13/pflag v1.0.9 h1:9exaQaMOCwffKiiiYk6/BndUBv+iRViNW+4lEMi0PvY=
 github.com/spf13/pflag v1.0.9/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+github.com/spf13/pflag v1.0.10 h1:4EBh2KAYBwaONj6b2Ye1GiHfwjqyROoF4RwYO+vPwFk=
+github.com/spf13/pflag v1.0.10/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
 github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e h1:JVG44RsyaB9T2KIHavMF/ppJZNG9ZpyihvCd0w101no=
 github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e/go.mod h1:RbqR21r5mrJuqunuUZ/Dhy/avygyECGrLceyNeo4LiM=
 golang.org/x/exp v0.0.0-20231006140011-7918f672742d h1:jtJma62tbqLibJ5sFQz8bKtEM8rJBtfilJ2qTU199MI=
 golang.org/x/exp v0.0.0-20231006140011-7918f672742d/go.mod h1:ldy0pHrwJyGW56pPQzzkH36rKxoZW1tw7ZJpeKx+hdo=
-golang.org/x/sync v0.17.0 h1:l60nONMj9l5drqw6jlhIELNv9I0A4OFgRsG9k2oT9Ug=
-golang.org/x/sync v0.17.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
+golang.org/x/sync v0.18.0 h1:kr88TuHDroi+UVf+0hZnirlk8o8T+4MrK6mr60WkH/I=
+golang.org/x/sync v0.18.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
 golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.36.0 h1:KVRy2GtZBrk1cBYA7MKu5bEZFxQk4NIDV6RLVcC8o0k=
-golang.org/x/sys v0.36.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
-golang.org/x/text v0.24.0 h1:dd5Bzh4yt5KYA8f9CJHCP4FB4D51c2c6JvN37xJJkJ0=
-golang.org/x/text v0.24.0/go.mod h1:L8rBsPeo2pSS+xqN0d5u2ikmjtmoJbDBT1b7nHvFCdU=
+golang.org/x/sys v0.38.0 h1:3yZWxaJjBmCWXqhN1qh02AkOnCQ1poK6oF+a7xWL6Gc=
+golang.org/x/sys v0.38.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/text v0.31.0 h1:aC8ghyu4JhP8VojJ2lEHBnochRno1sgL6nEi9WGFGMM=
+golang.org/x/text v0.31.0/go.mod h1:tKRAlv61yKIjGGHX/4tP1LTbc13YSec1pxVEWXzfoeM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

internal/cmd/t.go

@@ -19,6 +19,7 @@ import (
 	"github.com/unfunco/t/internal/list"
 	"github.com/unfunco/t/internal/model"
 	"github.com/unfunco/t/internal/storage"
+	"github.com/unfunco/t/internal/theme"
 	"github.com/unfunco/t/internal/tui"
 	"github.com/unfunco/t/internal/version"
 )
@@ -30,15 +31,21 @@ var (
 	ErrEmptyTitle         = errors.New("todo title cannot be blank")
 )
 
-// NewDefaultTCommand returns a new t command configured with the standard
-// input, output, and error file descriptors.
-func NewDefaultTCommand() *cobra.Command {
-	return NewTCommand(os.Stdin, os.Stdout, os.Stderr)
+// NewDefaultTCommandWithTheme returns a new t command using the provided theme
+// and configured with the standard IO file descriptors.
+func NewDefaultTCommandWithTheme(th theme.Theme) *cobra.Command {
+	return NewTCommandWithTheme(os.Stdin, os.Stdout, os.Stderr, th)
 }
 
 // NewTCommand returns a new t command configured with the given input, output,
 // and error file descriptors.
 func NewTCommand(in io.Reader, out, errOut io.Writer) *cobra.Command {
+	return NewTCommandWithTheme(in, out, errOut, theme.Default())
+}
+
+// NewTCommandWithTheme returns a new t command configured with the provided
+// input, output, error descriptors and theme.
+func NewTCommandWithTheme(in io.Reader, out, errOut io.Writer, th theme.Theme) *cobra.Command {
 	var (
 		today    bool
 		tomorrow bool
@@ -88,6 +95,7 @@ func NewTCommand(in io.Reader, out, errOut io.Writer) *cobra.Command {
 				}
 
 				m := tui.New(
+					th,
 					lists[list.TodayID],
 					lists[list.TomorrowID],
 					lists[list.TodosID],

internal/config/config.go

@@ -0,0 +1,75 @@
+// SPDX-FileCopyrightText: 2025 Daniel Morris <daniel@honestempire.com>
+// SPDX-License-Identifier: MIT
+
+// Package config handles loading and saving application configuration.
+package config
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/unfunco/t/internal/paths"
+	"github.com/unfunco/t/internal/theme"
+)
+
+const configFilename = "config.json"
+
+// Config captures the configurable application properties.
+type Config struct {
+	Theme theme.Config `json:"theme"`
+}
+
+// Load retrieves the configuration from the default data directory.
+func Load() (Config, error) {
+	dataDir, err := paths.DefaultConfigDir()
+	if err != nil {
+		return Config{}, fmt.Errorf("determine config directory: %w", err)
+	}
+
+	return LoadFromDir(dataDir)
+}
+
+// LoadFromDir retrieves the configuration from the provided directory.
+func LoadFromDir(configDir string) (Config, error) {
+	if configDir == "" {
+		return Config{}, fmt.Errorf("config directory cannot be empty")
+	}
+
+	cfg := Config{
+		Theme: theme.DefaultConfig(),
+	}
+
+	configPath := filepath.Join(configDir, configFilename)
+
+	data, err := os.ReadFile(configPath)
+	if err != nil {
+		if errors.Is(err, os.ErrNotExist) {
+			return cfg, nil
+		}
+
+		return Config{}, fmt.Errorf("read config: %w", err)
+	}
+
+	if len(data) == 0 {
+		return cfg, nil
+	}
+
+	if err := json.Unmarshal(data, &cfg); err != nil {
+		return Config{}, fmt.Errorf("decode config: %w", err)
+	}
+
+	return cfg, nil
+}
+
+// Path returns the default configuration file path.
+func Path() (string, error) {
+	configDir, err := paths.DefaultConfigDir()
+	if err != nil {
+		return "", fmt.Errorf("determine config directory: %w", err)
+	}
+
+	return filepath.Join(configDir, configFilename), nil
+}

internal/config/config_test.go

@@ -0,0 +1,59 @@
+// SPDX-FileCopyrightText: 2025 Daniel Morris <daniel@honestempire.com>
+// SPDX-License-Identifier: MIT
+
+package config
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/unfunco/t/internal/theme"
+)
+
+func TestLoadFromDirReturnsDefaultsWhenMissing(t *testing.T) {
+	dir := t.TempDir()
+
+	cfg, err := LoadFromDir(dir)
+	if err != nil {
+		t.Fatalf("LoadFromDir() error = %v", err)
+	}
+
+	if want := theme.DefaultConfig(); cfg.Theme != want {
+		t.Fatalf("theme mismatch, want %+v got %+v", want, cfg.Theme)
+	}
+}
+
+func TestLoadFromDirReadsConfigFile(t *testing.T) {
+	dir := t.TempDir()
+	content := []byte(`{
+  "theme": {
+    "text": "#010101",
+    "muted": "#020202",
+    "highlight": "#030303",
+    "success": "#040404",
+    "worry": "#050505"
+  }
+}`)
+
+	if err := os.WriteFile(filepath.Join(dir, "config.json"), content, 0o600); err != nil {
+		t.Fatalf("failed to write config file: %v", err)
+	}
+
+	cfg, err := LoadFromDir(dir)
+	if err != nil {
+		t.Fatalf("LoadFromDir() error = %v", err)
+	}
+
+	want := theme.Config{
+		Text:      "#010101",
+		Muted:     "#020202",
+		Highlight: "#030303",
+		Success:   "#040404",
+		Worry:     "#050505",
+	}
+
+	if cfg.Theme != want {
+		t.Fatalf("theme mismatch, want %+v got %+v", want, cfg.Theme)
+	}
+}