Since about is html. to console type this
say FF0000Example
if you want low-colored chat go to console type this
say Example FF0000Example
or you can type the color code in chat. doesnt work on some servers. and valve matchmaking servers
note:Since there was additonal icon for some reason. message is red taken directly form Tower defense(color is dark red)

This does not work on most of servers. previously worked on Blackwonder(now it isnt)

And ur done
Color Codes:
3EFF3E color is default green
1E90FF color default is blue(dark blue)
483D8B color default is purple
FF4040 is red team's color(light red)
99CCFF is blu team's color(light blue)
FFFFFF is white. its cleaner version.
FF8100 is Orange.
626261 is grey. known for silver. somehow
000000 is BLACK
E9FF00 is Gold. Yellow.
FF0000 is Dark Red used on example part
00FFFA is Cyan
000BFF is Goodly Dark Blue.
204335 is Cool Green
432025 is huge mix between dark red and purple
FF00FB is Magenta.