Utilities - u-color
Example
<div className="u-color-mono-300 u-bg-mono-700">u-color-mono-300/700</div>
Palette - mono
u-color-mono-000/700
u-color-mono-100/600
u-color-mono-200/500
u-color-mono-300/400
u-color-mono-400/300
u-color-mono-500/200
u-color-mono-600/100
u-color-mono-700/000
Palette - primary
u-color-primary-100/600
u-color-primary-200/500
u-color-primary-300/400
u-color-primary-400/300
u-color-primary-500/200
u-color-primary-600/100