Here is an alphabetical list of the colornames and their abbreviations, that are specifically used in Grasshopper Playground. Either the colorname or its abbreviation can be used. Thank you @Grasshopper_Frankie for providing much of the list. Others I was able to locate and verify them all in the playground. Please let me know if any modifications to this list are needed.
a = amber
b = blue
c = cyan
d = dandelion
e = ebony
f = flame
g = green
h = honeydew
i = indigo
j = jade
k = black
l = lime
m = magenta
n = navy
o = orange
p = pink
q = (gray-ish)*
r = red
s = (gray-ish)*
t = teal
u = umber
v = violet
w = white
x = (green-ish)*
y = yellow
z = (orange-ish)*
- The exact name of this color, I was unable to locate. But it’s abbreviation works.