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1. gdk_color_parse 'Blue', mycolor

2. gtk_widget_override_background_color mybutton, 0, mycolor

but I'm sure I'm missing a big chunk of understanding for part 1...

I see that gdk_colormap_alloc_color is mentioned and 'allocating' a color, but don't know what that means - and if it's necessary, 
what are colormaps anyway, should they be used ? :)

Any guidance and/or and a simple working example from someone with a better understanding of this would be great.

Thanks,
Emir