Colors and Color Arguments
Commands that take color arguments in STx can either take an RGB value in the format 'r:g:b', or one of the HTML color names (https://www.w3schools.com/colors/colors_names.asp). The values
b are the red, green and blue color intensities and can be any integer between 0 and 255.
You can retrieve a list of color supported by STx using the
STXCONSTANTS COLORS command.