i bought this today and in the store it looked ok but when i put it against the water i think nthe contrast in color is just to great but i’ll leave it up to yall please let me know what you think of it.

this pic is without the flash and blurry but thr color came out truer

I think you’re right, the contrast is too great. The backdrop is too dark and looks unrealistically purple. I can’t wait to see your finished SAR diorama. Maybe you could try painting a canvas yourself with changing shades of grey. Maybe a book in the local library about painting landscapes can help you.
Semper Fi,
Chris