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There are other better answers here already.
But you got me wondering, how red are red dwarfs really? Maybe they're just like a few % more red than our sun, but I bet they're still quite broad band.
So you maybe could have a similar range of colour reflection and absorption. And maybe there's enough R,G,B to saturate the receptors. I assume white is just that, when all color receptors are near saturated.
The eyes might not need to differ much, the brain can probably do everything in post processing anyway. All evolution needs to do to your eyes is to gather enough raw data that your brain can learn to differentiate, food, water, danger, things to breed with, and so on.
Maybe reduce the sensitivity of red receptor a wee bit, or maybe not, if plants are still absorbing lots of red, and we live amongst plants . . .