Yeah I'm a sucker for a good match-3 game myself too.
I wonder what percentage of the population is color blind though.
Some of the colours are so similar that even if you aren't colour blind it's a real challenge. Seriously at times there must only be +-1 difference in the RGB value.
There's something strangely compelling about staring and two almost identical tiles and working green tiles and trying to work out which has slightly more red in it.
It has a beautiful simplicity about it too.