Named Colors: dvipsnames
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@Code \documentclass[dvipsnames]{standalone}
@Code \usepackage{xcolor}


<FONT SIZE='-2'>
   black, blue, brown, cyan, darkgray, gray, green, 
   lightgray, lime, magenta, olive, orange, pink, 
   purple, red, teal, violet, white, yellow.
</FONT>


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More:

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@Code \documentclass[usenames,dvipsnames]{standalone}
@Code \usepackage{xcolor}