I are protanomalous: by squinting and being really imaginative, i can see the third shade of green: the boundary runs from like the middle of the large isthmus thing to the south, including the islands at the end of it, ne?

the cream and the blues look totally differentiable to me, but the darker blue <if that's what it is> looks kind of pink to me: fuchsia, purple, you know, one of those colours other people that are not me know the names of. Still, differentiable.

Generally, and i'm no designer or anything, i recommend that your colours not only vary in [good lord i don't know if my terminology is correct here but] hue but also in value: like, you want to put a more yellowy green next to a more bluey green? make the two greens have different amounts of white as well, maybe one is pastel and the other is highly saturated? colour is but one channel of info, and a weird one at that.