Which format should I copy?

HEX for CSS and design tools. RGB when a tool wants separate channels. HSL when you want to adjust lightness or saturation by hand, because the numbers mean something you can reason about.

Can I pull colours out of a screenshot?

Yes — that is the common use. Upload the screenshot and sample any pixel in it.

Color Picker

Sample any pixel for HEX, RGB and HSL, and build a palette from what you keep.

Runs in your browser — nothing uploaded

How to color picker

Upload an image, or use the picker directly.
Click any pixel to sample it. HEX, RGB and HSL are shown together.
Keep the colours you like and build a palette from them.

Questions

Which format should I copy?: HEX for CSS and design tools. RGB when a tool wants separate channels. HSL when you want to adjust lightness or saturation by hand, because the numbers mean something you can reason about.
Can I pull colours out of a screenshot?: Yes — that is the common use. Upload the screenshot and sample any pixel in it.

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