lol, the website reminds me of tropes like the professional cleaner whose house is messy, the chef who eats instant noodles at home, or the haut couture fashion designer who only wears jeans and tees. The colour expert whose website is monochrome.

"The cobbler's children have no shoes."

Maybe he understands the field so much that he prefers to exercise it minimally in his hobby. Or maybe he just can't decide. It also makes perfect sense for a study in colors to be against a neutral background.

My impression is that they are a compression expert, not a color expert. Make sense they chose uniform flat colors :D