No it won't look "Strange" as long as it is an entry deserving the highlight, and what "darker color"?

Consider posting a couple jpegs with your question, taking the mystery meat factor out of the question?

White interior doors has no bearing, but more importantly, will you be using the same color that’s on the exterior (if not white) and how does it relate to your foyer/decor as that’s more important. I like when a door is more of a feature and creates a nice connection.

I often paint the inside of the front door black or the color of the outside. In most cases the front door is different than the interior doors anyhow so the color just makes that look more intentional.

It is often done but when you ask we need context and pictures provide that . Post here in a comment. Also what dark color and why that color..

Mine are all wood except the front door that is white. Was that way when I bought the house and didn't even give it any thought.

Front doors are often different than the rest.

Paint websites like Sherwin Williams will let you upload a photo of your foyer/door interior and e-paint the door in the color of your choice.

Very easy to do. Consider posting the before and after photos for feedback.