>>5393645Nice, I like it.
Small tip: remove the black border around the spectrum.
>>5393672Too much orange for my taste. Try to keep things consistent. Your foobar background is light while all the other backgrounds are dark.
>>5393709Looks good.
One personal gripe I have is the solid colors background. I would use something like a gradient or pattern to make it look less bland.
>>5393719Needs some work. Try a different visual style.