Update color-principles.md

Updated the primary colors
Update color-principles.md

fixed the table format
Update color-principles.md

updated class names
Update color-principles.md

All colors added
Merge pull request #33 from ell0ell0/patch-1

Update color-principles.md
Merge branch 'gh-pages' of github.com:cfpb/design-manual into gh-pages

I am trying to merge a change in from the origin into my fork.