Thats quite a bit of green. Also, whats with the odd greyscale placement? The order seems to be broken.
And if you do build that map, please do something about that square border. Don't leave it as a drop off..
It's designed to have a different shade of green for each terrain layer. If you look at it and move up/left, you can see the terrain rising. It starts with the beach colours, then turns into greens, which get darker, and eventually turn into mountains, which eventually turn into snow.
I included a few "Very dark/Black" colours as an afterthought, because the rest of it was for terrain. It's intentional.