Well, yes you can!  :D  The effect is less obvious than if you use a high contrast color under your exterior color, but it still works.

It just makes it look like old paint, which is actually what I was striving for.  In a way, it looks a bit like burned wood.  Note to self: discovered how to make charred wood on accident!

With all of the white on the Heritage, I liked how the black door surround looked in contrast even though it was originally just the dark underlayer that was meant to have white paint crackled over it.  So, I decided to keep it black.  I've also started to paint the front door, using Barn Red by Americana.  It still needs another coat and some modest aging, but I love it already!  :D

For the interior frame of the door, I used Vintage White by Folk Art.  This will be the color I use for any painted wood trim inside the house.  I like the grey-white of the exterior, but the interior to me should have a yellow cast from cooking, candles, fireplaces and gas lighting to show its age.