This is the theme colors you can use, as well as for the font colors (All for image mode currently)
black
red
brown
white
yellow
yellowgreen
darkyellow
orange
redorange
pink
hotpink
darkpink
lightblue
darkblue
blue
random
green
lightgreen
seafoam
salmon
purple
realpurple
whiteblue
blackgreen
pastel
darkred
grayblue
peach
gray