Open source social media icons to download and use on website? [closed]

Where can I find social media icons (preferably in the colours of the respective social media companies' logos) to download and use on a website?

Note: I google (free social media icons download) and almost all results are commercial in nature, and none from the usual web developer sites like github or stack overflow unfortunately.

Suggestions so far:

• Font Awesome

Font awesome looks great, but isn't in colours of the actual companies, and isn't free (at least, not for heavy use).

• Bootstrap from a search, I don't think they offer social media icons, also only single-colour (not the colour of the social media company itself), but it is free

Is there anything that meets the criteria of i) in colour of company's logo, ii) free to download / use?