The following games now support the new custom colors:
The following new control characters can be used now in the usermessage SayText2:
\x07
Followup bytes (as string): RRGGBB
\x08 (supports alpha)
Followup bytes (as string): RRGGBBAA
Todo: implement this in the smlib colors API
I don't know why Valve decided to specify the color code as string, as this is not efficient, 1 byte for each color part would have been better to save banwidth, but ok.
https://forums.alliedmods.net/showthread.php?t=185016
https://forums.alliedmods.net/showthread.php?p=1717390