ive bought tons of cold cathod, and only a very small few were off color, to a small degree... these were the cheap kind, if you want a quality lighting system, get 1 or 2 cold cathod's from frozencpu.com, either the same color or 2 colors...
CC
COLOR - GOOD, ALMOST ALL THE TIME
BRIGHTNESS - HIGH
HEAT - LOW
NEON
COLOR - ALWAYS GOOD
BIGHTNESS - LOW TO MEDIUM
HEAT - MEDIUM
the choice is pretty easy, cathods are smaller, brighter, cooler, last longer... overall i think they are way better but that is just my opinion