User blog comment:ImperiexSeed/Was Hunter faster than Barry before he became Zoom?/@comment-3221148-20160806094658

Taking Velocity =/= Becoming Zoom

Maybe he was just a Yellow-lightning Zoom. We've seen him emanate yellow lightning anyway in the guise of "Jay Garrick", so presumably he only goes blue after achieving super-speed on Velocity (since Trajectory also went blue after going too fast on Velocity, while originally she also was yellow).