What is a half blue and half green karate belt?

Answer 1

It varies from style to style. If the stripes are length ways, they are typically one of the higher kyu levels. If they are blocks along the length, they may be a 5th or 6th degree black belt. We don't have either version in my style.

Answer 2

Every dojo is a little different with their belt orders and colors. It depends on the dojo you train at.