Think it's time these get refactored:)

Lets replace with some generic colour utils. What you reckon about `.u-colour-primary`, `.u-colour-secondary`, `.u-colour-tertiary`? Think of any better names? :)

We should also move all the `u-text-x` colours to utils. `.u-text-meta` > `.u-colour-meta`? Also reckon we should change the colour of it to the same as text-meta-dark. Current meta colour is too light.