Interestingly, I often see the after image of red as light blue…. I guess it depends on the hue of red. I also think we all see colours slightly differently.
I painted a square of fluro green and was already see the fluro pink forming around it before I had finished.
The violet was less successful. Maybe because it is such a dark colour? I thought it was a vivid, intense colour but I am not getting an after image from it. It should be yellow,shouldn’t it?!