[asnrk]

If you'll accept the step of copying the values into the tool that figures out the complementary colors for you, macOS comes with Digital Color Meter, which will tell you the color of anything on your screen.

[floatingatoll]

(It’s hiding in the Utilities folder if you can’t see it in Applications.)

[leesalminen]

I just do cmd+space and type color.

[rovr138]

Create a shortcut for it.

I have it set to CMD + Shift + C. Great to have it easily accessible

[neotek]

Hey, thanks to this comment, I just discovered that if you hit Cmd+Shift+C in Chrome it'll let you inspect any element by clicking on it. Cheers!

[arsenico]

Also in Safari

[harg]

and firefox

[meko]

This is why I have no side projects, yet. Most problems have already been solved.

[sh87]

Commentbait, I smell it but still will say this.. A good side project takes one or more known solutions and applies it to a niche. There's endless niches out there if you stand still and squint a bit.