If I am correct in my understanding the type of look you are asking about, it is called "Shading".
One method is by using an air brush to spray darker tinted paint/stain onto the edges or recessed areas, gradually reducing the number of coats as you move to the exposed area. This is called "shading" by Bob Flexner in his book "Understanding Wood Finishing". Although Flexner uses transparent stains in his descriptions, the method is the same with paints. For a finish like that, I would recommend you use lacquer because the tinted coating has to be sprayed on very thin and very light coats. This is harder to do with an enamel, and pretty much impossible with latex.
You may want to peruse a couple finishing books from the library before you start, and definitely set up some practice pieces first. Its pretty much a "get it right the first time" process, or you start over again.
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