I was looking around for an accurate comprehensive list of social network colors, but couldn’t find one. So I made a color pallete with all the colors from at least 47 different social networks. 59 colors make up this comprehensive pallete. If there’s any more you’d like added in an update, let me know.
Though extended license is available for this item, it does not offer you any further protections.
.ase, .ai and .aco

Blogger
del.ico.us
Deviant Art
Dribbble
Dropbox
Etsy
Facebook
Fancy
Feed Burner
Flickr
Formspring
Forrst
Foursquare
Google+
Hubpages
Instagram
Last.fm
LinkedIn
MeetUp
MySpace
Ning
Pandora
Paypal
Pinterest
Plurk
Quora
Reddit
RSS
Shutterfly
Skype
SnapChat
Sound Cloud
Spotify
StumbleUpon
Tagged
Technorati
Tumblr
Twitter
Vimeo
Vine
VK
Wiki
Wordpress
Yahoo
Yelp
Youtube
Zazzle

Did you know that Yahoo is the only site that uses purple? I didn’t either until I gathered all these logo colors.