A few companies make yellow or red tools. There pretty much high visibility for critical areas. I had to take a few OSHA classes and it briefly came up. Theres applications were there required for safety. I have never had the need for a bright yellow wrench but it is out there.
It took me forever to sell a new unused Williams supercombo14 piece set in red. I think most people would rather have chrome then red. I think high visibility tools are great, but they have a certain market.