Interface white on Mojave

On my MacBook Pro running Mojave 10.14.1, I notice that the folder list in DTPO doesn’t have a background colour as it does on a Mac running High Sierra 10.13.6 (17G3025); instead it’s just white.

It’s a minor thing but the white looks wrong somehow.

Is this a Mojave thing that will be addressed in a future update?

Just hoping it’s nothing wrong with my MacBook Pro.

Yes, it’s a Mojave thing but will be changed in a maintenance release.

oh good. right. ok thanks.