there should be commands for changing colors like background, and nicknames, and so on..

To make the background black:

/colour background 1

To make it white:

/colour background 0

To change my nickname colour to purple:

/cline 6 Watchdog

oh!.. kewl man! thnx ... hmm, possible to use rgb on /color to?.. saw something about it in the helpfile, but didnt quite understand..

at the top there is a crayons symbol, at which you can change colors (rightclick on one of the 16 colors to change the RGB... this will effect the way mIRC displays that color for all windows! so be carefull ;-] )

you can use the address book (icon beside color) for nick colors (last tab)

or else /cline but that's not permanent (I think hehehe)

You can use an RGB color as the background if you use /background. All you need to do is open a picture window, drawrect the window the color you want, drawsave a 1x1 pixel into a .bmp file, then use /background to use that file as the background for the window you want.