Primary-Color - $pc

Analogous - $pc-ag[x]

Extended-Analogous - $pc-age[x]

Monochrome - $pc-mc[x]

Split Complements - $pc-spc[x]

Triad - $pc-tri[x]

Quad - $pc-qd[x]

Gray Shades - $gray(x)

Secondary-Color - $sc

Analogous - $sc-ag[x]

Extended-Analogous - $sc-age[x]

Monochrome - $sc-mc[x]

Split Complements - $sc-spc[x]

Triad - $sc-tri[x]

Quad - $sc-qd[x]