Hey, I'm Seb and I created couleur.io to help me out in my own web design projects, many of which I'll share and make available as free HTML templates over at fffuel.co (work in progress). You might also be interested in cccreate, a page where I curate some useful online tools for frontend devs.
You can find me elsewhere on the web over at muted.io (interactive references and tools for music theory), rrrelax.app (little web app to help take slow deep breaths) and multicolor.io (where I share some of my photography).