Yes Nancy, that's right, your vase would be classed as green, and if you wanted to add something to the description you would describe the iridescent effects that it has.
As I mentioned, it's complicated, and there are some iridescent effects that DO change the categorisation of the Carnival colour. A good example is emerald green. In that case the iridescent effects are vivid and primarily blue/aqua. Emerald is not often found and is subsequently sought after (it is very beautiful). It's all explained in my (somewhat lengthy) article :-)
Glen