Bernard wrote: > I went as far as getting the RGB values that would correspond to L a b = > 100,0,0 using > xicclu: I got 96.52 233.78 177.57. But none of the raw developers that I use > in Ubuntu > Linux allow me to define a white point by its RGB numbers. That's odd. Programs like Photoshop certainly do. Perhaps you need to address this problem to the authors of those tools ? Graeme Gill.