Yes, it can be done!
Changing the color of Facebook’s Like and Share buttons is something that web page designers wish for, but up untill the rise of HTML5 was practically impossible. But today, thanks to SVG filters, it can be done. It’s still not very easy and, as usual, Internet Explorer is lacking support, but it is definitely possible.
Impatient? Just do it
For the impatient, check out the facebook button colorizer tool I built. You just copy-paste your button code, fiddle with the controls keeping an eye on the live preview until you like the result and then just copy and paste the colorizer code to your website. Couldn’t be easier.