Currently Enig support 00-23 (http://wiki.synchro.net/custom:colors#renegade_telegard_format)
...I think I'll go ahead and support up to 31 ala Mystic if people are actually using them.
I think it makes sense just for consistency since we support the same pipe, wildcat, PCBoard etc codes in messages and file descriptions and stuff. I have seen some people use them for iCE colors although I doubt many do.
Here's from the DOCs just in case you need it:
Depending on the terminal the 24-31 codes can have different results. Some terminals will use what is often referred to as "ICE colors" which are the non-blinking brighter backgrounds. Others may use blinking foreground text instead.
TERMINALS THAT USE BRIGHT BACKGROUNDS (ICE COLORS):
24 : Sets the current background to Dark Grey
25 : Sets the current background to Light Blue
26 : Sets the current background to Light Green
27 : Sets the current background to Light Cyan
28 : Sets the current background to Light Red
29 : Sets the current background to Light Magenta
30 : Sets the current background to light Yellow
31 : Sets the current background to light White
TERMINALS THAT USE BLINKING:
24 : Sets the current background to black with blinking foreground
25 : Sets the current background to blue with blinking foreground
26 : Sets the current background to green with blinking foreground
27 : Sets the current background to cyan with blinking foreground
28 : Sets the current background to red with blinking foreground
29 : Sets the current background to magenta with blinking foreground
30 : Sets the current background to brown with blinking foreground
31 : Sets the current background to grey with blinking foreground
--- Mystic BBS v1.12 A36 2017/11/14 (Windows/32)
* Origin: Sector 7 [Mystic BBS WHQ] (21:1/108)