If you want to change the color of text that you see, press Alt-K and set it up there. If you want to change the color of the text that you type that other people will see, use Ctrl-K and select the number you want to use. Note that if a popup doesn't appear when you press Ctrl-K, you should go into mIRC options and turn that on and try again. Alt-O > Other > Keys Button > Check "Control-K pops up color index"
