Change Inspector Colors?

Hi Everyone,

It looks like most parts of the Inspector cannot have their colors modified, like the headers (Title, Project, Dates, Repeat, Review, Note), the borders around the fields, the labels (like Estimated Time, Deferred Until, etc.), and so forth. I’ve tried a few different things through OmniFocusColors, but none of the settings seem to be attached to those elements.

Am I right in thinking those elements’ colors cannot be modified?