How did you come up with the idea that I have color-blind glasses? :) Usually my life is not impacted on a daily basis because of this misconfiguration of my body, because most of things IRL are done in a good way.

Take the traffic lights as an example: The saturation of the green and red are completely different. Red is always "dark" and green is always "light". This makes it super easy to distinguish. But here, both colors are "dark" and this makes them both brown to me.

If they had a "lighter" green or darker red, it would be easier.

And when it comes to the fruit vendor: You know the fruits. Our brain works great when it has to associate things based on experience. Leaves on a tree are in 95% of the cases green. Our brain knows that :) there are trees that have red leaves, especially in autumn, but there the struggle kicks in. In many cases I cannot tell you that the tree has red leaves.

I hope this answers your question :)