Standard colours - greyscale
Primitives
.bg-white
White - #ffffff
.bg-black
Black - #000000
Greys
.bsk-bg-grey-lightest
BAS grey lightest - #e1e1e1
.bsk-bg-grey-light
BAS grey light - #cfcfcf
.bsk-bg-grey
BAS grey - #7b7b7b
.bsk-bg-grey-dark
BAS grey dark - #383838