system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do electronics manufacturers use a Red and Green LED in their products when 1% of world is colour blind?

As a colour blind person, I can't tell the difference between the Red and Green LED that are used in products to depict on/off or charging/non-charging etc. Why are they used when at least 1% of the world is colour blind (8% of men in Britain). I would say I'm mildly colour blind compared to others, and I have issues. 
Why not Red and Blue?
gpt
Red LEDs were the first and easiest to make. As they researched on, they found out how to make green, and worked out orange and yellow. The process for all of these is cheap, and close to identical.

Blue LEDs are only a relatively recent invention. Their components are expensive and construction is difficult. So blue LEDs are much more expensive.

Add to that the 'stop/go' indication that is deeply entrenched in our brains, and there is plenty of reason to continue using red and green. If enough people complain there may be a change, but id doesn't look likely.