I've never tried using a florescent dye on Antron. Has anybody ever seen a puppet made like that?
Something to keep in mind is that by mixing the three primary colours (red, blue, and yellow plus black and white) you can make almost any other colour. Occasionally it won't quite work depending on the dye and material you're working with (Antron fleece reacts strangely to some dyes), but basic colour theory applies to paint as well as dye.
I have seen puppets dyed with florescent colors.
The fleece from One Way Street is NOT antron. It is a nice thick fleece, different than the fleece you buy at Joanne's, but definitely NOT antron.