I know you're trying to explain exactly what you want, but I'm not really sure I get it.

You want me to take my grassy map, remove the grid, take the gamemastery link'ed map, somehow extract the 'grass color' and apply it to my map, so you have a map with the right grass and sand color, and save it, and email it to you?

How about I just leave these images here, and you can edit the grass color to your liking :

These images are ©Arcknight but you can do what you will for private usage.

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