Taking a risk with colour

Some Artists have a natural talent for using vibrant colour colour, Howard Hodgkin, Patrick Heron and The wonderful William Bradley (you really must check out his stunning paintings). Inspired by their brave use of colour I experimented and have produced a piece that utilises colour way out of my comfort zone. I am pleased with the result and in particular within the way in which this piece has challenged how people see colour. Some people say this is green and others yellow. I know what I think. But the important question is; what colour do you think this is?