A graphical user interface (GUI) for selecting a color.
character. Initial color, see ‘Value’ section
tkwin. GUI parent window
Returns a selected color in terms of its
a string of the form
"#RRGGBB" where each of the pairs
BB consist of two hexadecimal digits
giving a value in the range
J.C. Fisher, U.S. Geological Survey, Idaho Water Science Center
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