One of the things you have to understand about yellow is that it is a colour. Colour is not a quality possessed by things you cannot see. In fact one might say that an invisible object could be defined by it's complete lack of colour.
Not so for Green Lantern, where I've encountered at least three occasions in GL Showcase volume #2 where our dumb hero is laid low by things that are both invisible and yet at the same time also yellow.
It's a neat trick if you can pull it off.