From World Samba
This template is an implementation detail, encapsulating the color association we use for its parent template. It has a single unnamed parameter and expands to
<color name>if a name exists among the 16 names supported by the HTML 4.0 standard (aqua, black, blue, fuchsia, gray, green, lime, maroon, navy, olive, purple, red, silver, teal, white, yellow)
No final semicolon is included, ever.