Basic colors are just logical. It goes from A to Z, from RED to PINK
A - red
B - orange
E - yellow
H - yellowish green
J - green
L - cyan (green with blue, dunno if that is cyan)
O - light blue
R - blue
U - dark purple
V - dark purple
W - light purple
X - purplish pink
Z - pink
and for black-white range it goes from 0-9
0 - black
1 - white
5 - grey
2 - dark grey
8 - light grey
By RED - PINK i mean classic rainbow
A B E J O R W Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
PS:You need to use capital letters "A" not "a", if you use lower case letters its the same color but darker (with lowered saturation)
A - red
a - less colorful / darker red