Color doesn't matter anymore. Color can be whatever the manufacturer wants. I would look up what the OEM installed and compare:

Silicates. There's silicate, low silicate and silicate free. Green has traditionally contained silicates or low silicates. Silicates in the coolant form a protective coating on your internals, however from what I've read, as they age out apparently the silicate coating can wear off and flake into the coolant as sort of an abrasive deposit. I run two japanese cars that specifically call for silicate-free coolant, which is the same stuff we use at our shop in all our new semi trucks.

Nitrites. Coolants for cars and diesels used to contain nitrites as a cavitation inhibitor. Nitrites will corrode aluminum so they have been going away with newer coolant formulations.