Can Colors
Unfortunately the color cans are for less that intelligent consumers. I have a friend who uses a kerosene construction heater and an employee picked up a RED can of 100LL aircraft fuel from his hangar area where the employer had the yellow kero can. The employee took the can to a job site and was about to fill the heater when the crew leader saw him about to fill the heater with the gas. That would have been a short day on the job if the fill was completed.
Since my wife cuts the grass, I had to specifically tell her to leave the yellow can alone.
Side note: For some reason, If you get a zero radius mower, someone who never liked to cut the grass suddenly do. I think it was a great investment.