Set the frame back from the front ...
Setting the frame back a little will eliminate the need for an exact match, a shadow will "hide" a color deviation. It will look intended also, rather than attempting to be flush and not perfect. Keep the frame as narrow as possible because you're just hiding the fixtures, and the only way to see them would be to lean over and look upward. A normal person standing will not see them.
Nice looking cabinets BTW!
The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)