[Sharlin]

Blue leds are an obviously incorrect choice; they are only used because are novel and trendy (well, I guess they used to be novel and trendy, anyway). Human color vision is the least sensitive to blue light – but human low-light vision is the most sensitive to it!

[exhuma]

As someone who is red/green colour blind, I disagree that they are an incorrect choice.

Annoying at night yes. But wherever they are used I can finally make out the difference between an ok/nok status.

[Sharlin]

Ah, I’m red/green blind too but most blue leds in electronics don’t seem to have a status function beyond "on/off", they’re there just to look futuristic.

[xupybd]

Yeah my phone charger has a super bright blue led in it. It's kept in a draw at night as the entire room lights up. I keep meaning to cut out the led.

[adgjlsfhk1]

my best guess for blue lights is that it's one of the ones with higher energy efficiency and red/yellow would indicate problems.