[DustyPorViva]

Ya, none of those modes will do this, in fact, all modes simply change the way alpha is drawn.

Regardless, you simply can't compare Graal's RGB to standard color theory because in photoshop and such you're simply getting the color value of a single pixel. You're never working with the value of multiple colors like Graal does. Graal just handles it differently. There really is no work around for this unless Stefan adds a saturation value.