Inclination color

I’ve so far only completed a few runs. I use the NPE Runn.
I have set the inclination to either what it says in the upper right corner that the course is. Our to what it says the workout should use.

In the first case, when just running, the color of the text for the inclination shift color. Although the inclination it self (the number) is constant. What does the color signify?
Does it take the inclination reading from the NPE and compare it to what it “should be”?

I really miss a user manual. :blush: