Not sure if this is more or less of a problem for people wtih red-green colorblindness.

On the one hand, it's harder to differentiate at all. On the other hand, it kind of removes that established expectation and keeps you in the habit of adapting.

Why not both?

If they don't taste like peppermint, I'm sending them back.

How about this food is poison and snake bites heal?

Reminds me of the blue stop signs