I'd probably overdye the sleep shirt I actually have a couple of fail tees curing to launder after hubby gets thru the shower with black spirals overdyed on them, but I've also had some fun results using the same technique with different colors. Navy also pops with bright colors so might give you a very nice result, or you could do a spiral dye and apply perhaps navy and fuchsia on alternating wedges of the "pizza," like two wedges of navy opposite two wedges of fuchsia, with a wedge of white between them for contrast. You could also experiment with different or graduated colors from the inside of the spiral tie outward, so maybe navy in the center and fuchsia toward the outside, or vice versa.
My outlook is that if it's already a Fail shirt, I can't likely make it worse -and if I do, I have fabric for other experiments.
Wow, my "Fail" T-Shirt is getting more attention than the "healthy" patients!
Seriously, though, it's nice to see so many suggestions from the community.
I like the idea of the over-dye, but I'm having a hard time imagining a navy/fuchsia spiral on top of an already busy pattern - it might cause seizures! Still, it might be worth a try, as I agree that "if it's already a Fail shirt, I can't likely make it worse".
The problem is, I've used up all my mixed dye for now (I went through
13 8oz bottles last weekend in the mother of all marathon tie-dye sessions!), and am taking a break, so it might be awhile before I attempt anything.
Also, I don't mind having the "Fail" around for awhile - it keeps me humble!
Tie-Dye Todd