Shading colours that work for fluorescent orange

[jimmiprice]

Guys a bit of help with some decent shading colours for my shells would be handy. I have had my shell colour scheme for years and dont want to change but i would like to "spice" it up a little. Im handy with an airbrush but just cant find a colour to do some shading in the fluroescent orange section of my shell. In the past ive tried yellow which made the flu look dirty and red which just took the brightness out of the shell. Am i missing something obvious or is there not a lot to shade this colour with ?
Thanks Jimmi.......