Currently, when yellow and blue highlights overlap, the resulting color blend is a grayish olive color. Depending on the context, it hardly reads as "green" at all. See screenshot below. It would be nicer if this blend were a little more recognizably "green."
On the other hand, the nice thing about the current color is that it can easily be distinguished from the pure green and from blends like green-blue and yellow-green-blue. (See below.) Can we define a blue-green blend that's more saturated but is still distinct from other blends?