add separate colors sketch library with name colors in palette and shared styles

[estevesd]

Add new Sketch Library

Changes proposed in this pull request:

Add new Sketch Library for colors.
Colors are named according to the variables defined in @blueprint/core.
Colors are available in the palette as well as in shared styles

Reviewers should focus on:

Is it useful for everyone? or only me?

Screenshot

[palantirtech]

Thanks for your interest in palantir/blueprint, @estevesd! Before we can accept your pull request, you need to sign our contributor license agreement - just visit https://cla.palantir.com/ and follow the instructions. Once you sign, I'll automatically update this pull request.

[estevesd]

perhaps this should be added to the kit instead of a separate library ?

[aycai]

Yep, adding it to the kit makes sense - components and icons will benefit from this!

Sketch currently treats text and layer styles as separate lists, I think removing the text colors and adding them into their respective text styles makes more sense.

[aycai]

Checked the file in #2817, looks good there 👍

[aycai]

hey @estevesd, wanted to close the loop here. We're planning on merging in #4007 which I believe contains these changes, so going to close this PR. Does that sound good?

[estevesd]

Hi @aycai. Sounds very good. Awesome work from @terpimost on #4007