More info and the original LESS sources: lipis.github.io/bootstrap-social/
btn-bitbucket
#205081btn-dropbox
#1087DDbtn-facebook
#3B5998btn-flickr
#2BA9E1btn-github
#444444btn-google-plus
#517FA4btn-instagram
#DD4B39btn-linkedin
#007BB6btn-pinterest
#4875B4btn-tumblr
#CB2027btn-twitter
#2C4762btn-vk
#587EA3