Haha, thanks! I wish I could do digital painting like most of you guys, but I'm to impatient to learn advanced programs, so I'm stuck with my brushes and paints

I wasn't satisfied with the color transition between coast and open sea, it looked to gray to me, so I worked some more on that with pure Burnt Umber. Then I painted the other landmasses' coasts the same way.
Click image for larger version. 

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If you notice that the colors change slightly, it's because my scanner doesn't quite capture the real colors so I have to tweak them afterwards (pretty much all image editing I can do!). I think the previous WIP, the one with only the western island/mini-continent outlined, is closest to the real colors.