Pure black (#000) is avoided because
it may look unnatural on screens.
#1A1918--color-black#A3A2A3--color-gray#E7E7E9--color-silver#FFDF00--color-yellow#00A651--color-green#116bb1--color-blue#C8302F--color-red#F0A800--color-orange#777577--color-darkgrayrgba(0,0,0,0.55)--color-darkgray-alpha