For humans with red-green colour blindness? I don’t know, you’d have to ask them! There are two types of red-green colour blindness though, people who lack red cones and people who lack green cones. I think the lack of red cones would make the perception more like the image above, whereas a lack of green cones would make the red light very visible but the green light a dim purple-like colour.

To make this image I used a website that was specifically for seeing a dog’s vision so who knows how accurate that is.