I promised pictures...
First, the flashlight in question (Xeno E03 with neutral-white XM-L), with purple camo and yellow lanyard:
Here it is with the lanyard I made for the TBD swimming Spyderco (I left it loose enough that I'll replace the huge orange carabiner with something more suitable):
I tried to dye some yellow nylon zip-ties as a bit of practice. (Blue PM2 is there for color reference.)
I was going to go into great detail about how much dye I used, what solution I put it in, how long I kept each piece submerged, whether I lightened it or not, and share the result. Sadly, 4 batches and hour and a 1/2 later, all I have is black:
I will say I did most with 4C water, 5Tbs of color, along with salt and vinegar, and let 1/2 sit for 10 minutes and 1/2 for 20. I then "cured" them in an ice bath.
When they all came out way too dark, I put the head-ends in die remover, and did one more tie in 4C water, 1T dye, salt and vinegar, for 5 minutes.
It's the one at the top. I'm hard pressed to tell the difference.
The remover worked enough that I can just make out the black permanent marker underneath, which I couldn't prior.
So, unless someone can clue me in to the trick to turn Yellow into Purple, I've given up on the dyeing idea.
I think the lanyards will help "tie" it all together, whichever way I go (leaning toward a yellow Salt I; tempted by the Pacific, but I need to try them out one more time.)