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Colour Conversion Command

The whole situation around defining colours in Gtk+ is confusing. There are so many different ways including names, hex, int and decimal depending on what package is being worked with! I need to come up with a utility command to do these conversions....

gnocl::colour <in> -outFormat opt

The command needs to smart enough to know what the input format is...

Perhaps a cluster of commands or sub commands?

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