Finding consumer hardware that isn't riced to the max is getting hard. I wish pcpartpicker had a checkbox to filter out anything with RGB lights. Or one to filter out things marketed towards 13 year old boys - but that might be harder.
Preempting the inevitable comment: "just turn it off". That doesn't always work. I bought a mouse once, I think it was Razor, that required their electron slop-ware to control the lights. And if you didn't keep the software running, the lights would default to on. I had to take it apart to desolder the LEDs and throw them in the trash. And of course, like all mice I've seen, the screws were under the teflon feet, so I had to mangle them slightly to get in there. It was a decent mouse otherwise, but screw that nonsense.
Preempting the inevitable comment: "just turn it off". That doesn't always work. I bought a mouse once, I think it was Razor, that required their electron slop-ware to control the lights. And if you didn't keep the software running, the lights would default to on. I had to take it apart to desolder the LEDs and throw them in the trash. And of course, like all mice I've seen, the screws were under the teflon feet, so I had to mangle them slightly to get in there. It was a decent mouse otherwise, but screw that nonsense.