The Problem:

You know those blue outlines that land has in certain areas that designate a shallow ocean?  I want those.   Not only must they be a good color, but they should be editable.

 My Solution:

I created a function on the ocean water that blended it with a light-blue color at certain areas around continents.  I lowered the proportion of the light blue around continents to a realistic amount, and got  the following: