So you're willing to push your idea to production, but can't decide which colors to use? Here comes the savior.
A short list of useful web applications & sites will probably do the trick.
Colourcode - Find your color scheme
BrandColors - A collection of major brand color codes curated by Galen Gidman
COLOURlovers - Color trends and palettes
CSS Color Names - All those native CSS color names
Flat Design Colors - An great article from Designmodo about types of flat color schemes
Flat UI Colors - Sex for your eyes
My work here is done. Enjoy.
And oh, those are the ones I found most useful till now. Will probably update the list over time.