Colors
white	green	yellow	red
#FFFFFF	#008000	#FFFF00	#FF0000
rgb(255, 255, 255)	rgb(0, 128, 0)	rgb(255, 255, 0)	rgb(255, 0, 0)
hsl(0, 0%, 100%)	hsl(120, 100%, 25%)	hsl(60, 100%, 50%)	hsl(0, 100%, 50%)