Two more suggestions. Tint the canopy before cutting it off the mold flanges. They occasionally warp if overheated and the added material helps keep them in shape. Also gives you something to grab that won't smudge the results.

Don't try and economize and use only one color. Black Rit dye alone produces Orange and Navy Blue alone produces light Easter Egg Purple. Leaving it in overnight produces a lovely dark Easter Egg Purple. Equal parts Black and Navy Blue produce a coffee color. All of these also produce lots of off color language. Ask me how I know. I'm the pilot of the only "amber" tint canopy on a Contender 60.