I just tried dyeing my brown suspenders black. Fabric dye is…a mess. And the ultimately it didn’t do that good of a job, even leaving the suspenders in there for 30 minutes. And to clean the stuff up, you’ve got to use bleach! I guess this is why stuff comes in different colors in the first place. I’ve resigned to buying a new set of suspenders (now that I can get them in black). But for future reference: dyeing…not recommended.