Move usage of chroma-js to color

[mjsisley]

I believe the npm package color provides most of the functionality of chroma and is 10kb lighter.

If you are interested, I will look into trying to replace if possible.

[hkjpotato]

Why not mention chroma-js in the readme. I thought u create the color conversion function in such a small libs.

[HerrBertling]

I think in terms of creating color palettes, chroma-js operates in a different way than color (check this blogpost) – from a first glance, I would have expected the palettes to be generated with this: https://gka.github.io/chroma.js/#scale-colors

But yes, the way chroma-js is currently used here, replacing it to reduce bundle size would probably make sense :)