If it's the RGB strips you're looking at red, green, blue, magenta, cyan and white are just a matter of how the solder connections are made. Straight connection from power to a section of strip. The single color strips may offer greater intensity (lumens), I've never looked into that. I'm using a cheap RGB strip and in a well lit room the engraving isn't very bright even at a full 12V. Searching Amazon or Ebay for "RGB remote control" brings up a lot of results and that's the easy way to get more variety of color.
If you're new to this here's an opportunity to learn from my mistakes.
Compare the front and back wheels, that's what happens if the material isn't absolutely level.
Looking at the CAMARO text shows what happens if the cutter runs too deep, to get detail the surface just needs scratching at 0.008" or so.
A 60 degree cutter would have been a better choice than the 90 degree used. And it should be an engraving bit instead of generic v-bit, v-bits often don't come to a true point.
And if you own a drag knife....well lucky you.