While I, too, would like access to more colors for my own use when I display different things, you are making a faulty assumption.
You cannot possibly tell what your color choices will display on my screen. I can assure you that what you see will definitely not be what I see. I've altered the default colors (multiple times, actually, using different color schemes)...and none of them use the default colors (barring the mIRC Classic scheme). Some of them don't even have the same basic color for a certain number...6 might be a green instead of a purple.
Since that is true, no matter what colors you type, I won't see what you do, no matter how many additional colors we got access to in some future version.
