gdkColormapAllocColors(colormap, colors, writeable, best.match)colorswriteableTRUE, the colors are allocated writeable
(their values can later be changed using gdkColorChange).
Writeable colors cannot be shared between applications.best.matchTRUE, GDK will attempt to do matching against
existing colors if the colors cannot be allocated as requested.successncolors. On return, this
indicates whether the corresponding color in colors was
successfully allocated or not.