Rainbow Tabs, sorting browser tabs by color

I've been known to have nearly 70 tabs open in a single window. At that point the tab bar stops helping you find anything. So I decided to at least make them look good.

Rainbow Tabs sorts them. Click the toolbar icon and the tabs in your window reorder red through violet by the main color of each site's icon. Tab groups move as a block, placed by their group color, with the tabs inside sorted too. Pinned tabs stay put. Click again to undo.

Deciding what color an icon is

That turned out to be the whole project. Average the pixels in a colorful icon and you get gray, because opposite colors cancel out. So colors are sorted into hue buckets, weighted by how saturated they are, and the heaviest bucket wins.

Notification badges get ignored, since a red unread dot is usually louder than the logo it sits on. Pale icons have to clear a higher bar before they count as colored. Whites go first and darks go last, like bookends.

Some cases are still unresolved. Google's multicolor logo measures as a vivid blue, and I'd rather it sat with the whites. I haven't won that argument with the math yet.

A toy, and that's fine

Not every experiment needs to save anyone time. This one is a toy, so the only question is whether anyone clicks it twice. I do. My 70 tabs are a rainbow now, and it's so pretty.