AdiIRC supports control codes for formatting text.
Colors blocks of text.
Ascii char $chr(3)
Ctrl + K can be used in editbox to type this character.
The character can be follow by 2 digits that represent the color number, the colors can be changed in Options -> Colors -> mIRC Colors.
$chr(2) - Ctrl + B - Makes the block bold.
$chr(29) - Ctrl + I - Makes the block italic.
$chr(31) - Ctrl + U - Makes the block underline.
$chr(15) - Ctrl + O - Stops all formatting.
Alternative colorchar
$chr(61442) - Alternative way to show any color.h1.