Copy the latest colors from the old UI Kit

[vic-tian]

@birdofpreyru - I've fixed the wrong colors in our _variables.scss https://github.com/appirio-tech/tc-ui/blob/feature/connectv2/src/styles/_variables.scss

These are the correct colors and semantically separating color names from variable names. They work as a drop-in replacement without any need to refactor the code right away. I saw we missed the yellow gamma entirely, while there was a gold one that I didn't define.

Please make sure we're using the correct colors from the file I shared.

[birdofpreyru]

Ok, done, the demo page is temporarily here: https://community-app.topcoder-dev.com/examples/color-mixins

[vic-tian]

Looks great! I'll include this with all design specs from now on! 👍