I thought I'd include a picture of several green CREB 145s in my collection. As Lee has pointed out, shades of green and blue tend to "wash out" and appear the same in a back-lit display case. Although sunlight works best for me, this pic is in an overhead lit curio cabinet. Starting from the left: yellow olive green FAB error, darkest yellow green I've seen, regular yellow green, and finally what I believe is chartreuse.