[withdavidli]

Not sure why you're getting downvoted.

This was my first thought. The posts above mention using an app to read RGB. An overlay using AR would bring immediate value, I would think.

My colorblindness is mild. Can tell most colors but fail the petri dish color test around round 3-4, nothing pops out at me.

[Khaine]

I think the point is devices should be designed to be usable by colourblind people, without having to buy an additional device.

Can you imagine telling someone a wheelchair, that should just buy a portable crane to get into buildings that uses stairs?

[withdavidli]

That would be great, but reality is that product development at many places depends on a few people to be aware of accessibility in the design process.

And there are situations outside of product usability it will be helpful to know what is commonly seen. For example, when someone asks you to pick up X item at a store that is a color that you have a hard time identifying.

[setr]

It seems to me the simplest thing would be to have an app that renders the camera's reds as blue or something

It would at least suffice for these obvious kinds of things