Identifying marks can be used for balance or radial run-out. Tire manufacturers and car companies work together to establish various colors to indicate the different limits. The car company may be "matching" the roundness of the wheel or the balance of the wheel. Sometimes one is more important than the other and it may depend on wheels being steel or aluminum.
I know of no way to establish a specific meaning to marks of a specific color without information from the tire company, not a dealer but the engineering dept.
Even knowing if the mark means weight balance does not mean the amount of tire un-balance is equally offset by the level of wheel un-balance.
I write a blog on RV tire application and safety. RVTireSafety.com
Also give seminars on tires at RV events across the US. 40 years experience as tire design & quality engineer for major tire mfg. Freelander 23QB on Chevy chassis is my RV