the green stuff is tracking dye that is added when the AC is refilled...so that you can spot where there is a possible leak in the AC system.
you are supposed to use an UV light and glasses to spot the leak..as it is ultraviolet color...so ..if you can actually see that much liqiud...its a big leak.

does your AC work at all?its should not work if its a leak that big...even if the AC is missing a couple of hundred grams of AC refrigerant...the system will not work.