yes, that's just a storage method, I don't see the linkever heard of planar bitmaps?
of course, I too use monochrome planes as light planes, but what's the link with HLS as you originally wrote?three seconds of thought should make you realize how easy it is to provide bitmap data of monocolor planes or properties and then adjust those properties rather than providing static color data
Recoloring bitmaps is only good for things that the user really needs to color (tracks, etc) to identify them.

