theme() is not recognized

[MihneaNandra]

I know it may be a silly question but I cannot find the answer anywhere.
I'm using Tailwind with CRA and CSS modules.

I've overwritten the default theme colors to my own ones.
When I try to use the colors inside my CSS modules like this,

.amountSign { color: theme('colors.pink'); }

it seems like theme() is not recognized.

Should I import something from somewhere to make theme() recognizable? Thanks in advance