Some explanation:

What is happening is that the color of the armor is not being preserved when it is given to a bot. Everything ends up being without color.

Some pics to illustrate:

before:
http://img594.imageshack.us/img594/6470/eq000000p.jpg


after:

http://img694.imageshack.us/img694/8763/eq000001.jpg

For reference, the bot is wearing Kizrak's armor.

With this change, the color shall be correctly preserved and the slots can still be tinted to your heart's desire.