I fully agree. I think a big reason for that, is colors like black, taupe, grey, (blah, blah, blah)....are "professional appearing" colors, and more acceptable in business world circles. (I had many sideways glances with my bright colored pens, notepads, folders, etc. when I worked).
I think bright colors stimulate the mind and enable clearer thinking, which (I would want, anyway) would be best in a business culture, but not so.
It has to also be said that studies have proven that Alzheimer and Dementia patients are more likely to eat more if given food on a colorful plate or in bowl.
The world's hard enough.....let's smile while we can.....if it's purty, and makes you happy......go for it

I believe in colors having an affect on your mood just like sunshine does when it's out. So be colorful as much as possible.

My phone case. Lol
At least I can find it it that black hole I call a purse!

I have always worn PINK!! Bold, bright and every shade lol. I dress younger and I get compliments when I wear happy colors. I'm 64 now and if I dress like a 4 year old, I'll take the compliments. WEAR COMFORTABLE CLOTHING AND COMFORTABLE SHOES AND ANYTHING THAT MAKES YOU HAPPY.

I let my grandchildren choose the covers. It was a thoughtful exercise as the boys consider personality.
So for one I pad I received a panda and for the 2nd a cover that matched the iPhone.
❤️❤️