the color to allocate. On return the pixel field will be filled in if allocation succeeds.
If TRUE, the color is allocated writeable (their values can later be changed using gdk_color_change()). Writeable colors cannot be shared between applications.
If TRUE, GDK will attempt to do matching against existing colors if the color cannot be allocated as requested.
TRUE if the allocation succeeded.
Allocates a single color from a colormap.