Well good quality pressed hash like 'bubble' and 'Red Leb' would be sandy and light coloured but such gear is hard as fuck to get hold of commercially and would be nearer the top end of the quality scale.
I've only ever had Lebanese twice and light coloured slate once but neither were in any decent amount really.
Nearly all commercial hash is dark and certainly soft hash is either dark green/brown or nearly black because of the oxydisation as it's worked and pressed.
That soap bar is light coloured because of the fillers used and the fact that it hasn't had animal fats and oils worked into it to keep it soft, also the minimal amount of oxydisation occuring as it's been bagged and pressed dry (to an extent).