Maps every theme colour name to a theme colour slot. A colour that uses a name such as bg1 or
tx1 (SchemeColor) gets its colour from the slot the name maps to.
The default map translates bg1 to lt1, tx1 to dk1, bg2 to lt2, and tx2 to dk2,
and every other name to the slot with the same name. A map that swaps the light and dark slots
gives light text on a dark background.
Maps every theme colour name to a theme colour slot. A colour that uses a name such as
bg1ortx1(SchemeColor) gets its colour from the slot the name maps to.The default map translates
bg1tolt1,tx1todk1,bg2tolt2, andtx2todk2, and every other name to the slot with the same name. A map that swaps the light and dark slots gives light text on a dark background.