It is a little diffrent between colour names in mw2 and in black ops, for example: (mw2: ^0p^1w^2n^3a^4g^5e = pwnage)
(black ops: ^^00p^^11w^^22n^^33a^^44g^^55e = pwnage).
Here are the codes for the colours in black ops and mw2
^0-^^00= BLACK
^1-^^11= RED
^2-^^22= GREEN
^3-^^33= YELLOW
^4-^^44= BLUE
^5-^^55= LIGHT BLUE
^6-^^66= PURPLE
^7-^^77= WHITE
^8-^^88= IS A COLOUR THAT CHANGES DEPENDING WHAT LEVEL YOU ARE ON.
^9-^^99= GREY