We have a cooker with a blue LED display and the colour appears to cause excessive flourescence which I feel is possibly a spectral sensitivity peak of the human eye.
What you are seeing is the fact that blue light is bent less during refraction than any other colour. Consequently is is more difficult for the eye to focus blue light. This explains why blue snooker balls appear to have a glow round them.
There used to be a dolly blue factory in Backbarow in the English Lake District.http://en.wikipedia.org/wiki/Backbarrow
The surroundings were covered in the stuff and this gave everything a soft edge that was most unpleasant to look at. It has since been cleaned up and now you would never know.
Finally a photon of blue light has more energy in it that a photon of any other colour so this gives a greater kick to the retina when on impacts on it.