I love these free social media icons from Sweet Faerie Designs. There are 12 very cute colors and it is so easy to download. Just follow the link and click download by the color you want.
I am using these myself as a part of my new blog design. Hopefully it will be ready in the next few days.
Here is another great set of icons from The Academy. These colors are based on the Pantone colors of the year... this year is tangerine tango.