Sorry, I wasn't implying you had intentions to do something illegal. Here is information that should be of help.

Problems with dyed fuel are caused by the higher sulfer levels allowed in off road fuel, not the dye itself. Clear fuel has a 5 ppm sulfer content and dyed fuel can be as high as 500 ppm.

On road fuel has a low sulfur content to prevent catalytic converter damage. The sulfur will deactivate the catalyst and lead to soot clogging of the converter core. The seal shrink&swell characteristic of low sulfur fuel is different than the high sulfur fuel also. The process of producing the lower sulfur content raises the Cetane rating of the fuel, but lowers the fuel lubricity. Some engines need the higher Cetane of low sulfur fuel.

You can use undyed fuel and get the tax credited back for off road use.