Color is no solid indication of what chemical you are dealing with.
But, in general, automotive anti-freeze is usually that yellow green color and RV antifreeze is usually pink.
Glycol itself, whether it is ethylene glycol or propylene glycol, is clear in color.
The color comes from a corrosion inhibiting additive and I'm unaware of any standard that dictates the color of the inhibitor to specific uses.
If you didn't pour it out of the manufacturer's container yourself, you really can't be sure what you have in front of you.
On a side note, some inhibitors aren't compatible together and can react by producing a sludge in the system they share.
Also, glycol solutions have inferior heat transfer capacities and qualities to plain water. They are utilized for freeze protection reasons. At least that's what was relayed to me by our engineer during a recent facility remodeling project.