Forget colors and focus on coolant formula. These days problems don’t come from engine materials being incompatible with a coolant, but with mixing incompatible coolant formulas.
If you’ve got HOAT, stick with HOAT, no matter the color. Same goes for OAT.
It’s really quite simple if you don’t look at the colors, which were introduced to create confusion and get the costumers into dealer bays, instead of quick lube shops or indys.
Another option is to do a flush and pick whatever you like or is most available in your area.