There already is freshcode.club

A dutch company seems to have solved that problem (color recognition) by using a mix of mostly green and some red leds.
They use green leds because the human eye is most sensitive to green light in the dark, so the green light gives the best visibility at night. But to enhance the color recognition (which is basically zero with the almost monochromatic green light from the leds) some red leds are added.
Here you can find a nice presentation (with explanation) of the product.