.bg-primary[primary, info, success, warning, danger, accent, dark]

color: b-t[top, right, bottom, left]-primary[primary, info, success, warning, danger, accent, dark]
width: b-t[top, right, bottom, left]-2x[2x, 3x, 4x, 5x]

Text options

text-primary[primary, info, success, warning, danger][-lt[lt, dk]]