Update color-yellow-dark

[sarahill]

Update color-yellow-dark for accessibility

See #42 for details

Fixes #42

[kaelig]

Looks like the dist/* files weren't formatted correctly.

Can you try running:

dev up
yarn dist

And then commit & push:

git add dist docs
git commit -m "Format files"
git push origin update-color-yellow

Hopefully this will work! Let me know if it doesn't and I'll troubleshoot.

[sarahill]

Ok, I think that worked.