or you can use the metallic blue or electric blue or . . .
they have quite a selection of color
for a 24" width, it is about $2~$5/yard depend on the quality
also buy a vinyl applicator/squeeze, it's about $3
the applicator is a lot better than using a credit card to apply.
Alan -AJ_77- put a blue background on the wall behind the tank.
i like that idea
Tak