Best color picker?

What would be the best color picker for interface design?

At Atomic we’re building interface design software, and we want to ensure we provide the best color picker possible for designers.

The mockup above isn’t a meant to be a final solution, it’s more of a stripped back starting point. I’d love to hear your thoughts about what’s the most important things a great color picker needs to have.

More about Atomic: https://atomic.io