Its all about personal preference.
Personally,I wouldn't have a hump that was a different color than the tail section unless...
It was a totally custom job and I was breaking the paint scheme into sections.
For instance,if everything above the black line I drew was one color,and everything below it was another. To me,that might work. What you've done creates a "choppy ness" that I'm not fond of. The hump and tail are one if you ask me.
RSD.