They dont care

The suit changes it. That’s why young Barry has blue lightning.

Idk seems like nicks answer is more accurate

Oh and it’s yellow, not orange

My guess is Barry's lighting was always blue

Maybe the different suit or a symbolic reason? Or just inconsistencies. Who knows.

No the suit quite literally changes it it’s an objective answer

The suit was made to help dispell energy from the lightning he generates, and in doing so it changed his lightning color