背景色変更

black
navy
gold
darkolivegreen
maroon
indigo

dimgray
mediumblue
yellow
olivedrab
darkred
darkviolet

darkgray
royalblue
khaki
green
crimson
darkorchid

silver
cornflowerblue
lemonchiffon
mediumseagreen
lightcoral
mediumorchid

lightgrey
skyblue
lightyellow
mediumaquamarine
mistyrose
plum

white
lightcyan
ivory
azure
lavenderblush
lavender