I think they are yellow in the PT, even in the end duel in Episode 3 which is blue vs. blue. Looks weird, yes I agree
Yes, they aren't plain white in the PT ( i should have said "whiter" and not "white")but the flashes are smaller and less noticeable. In ANH the flashes are large and have a yellow/ green colour to them and they just jump out at you. The PT flashes have a more orange / red glow to them. I decided to just go plain white because at the time i couldn't get the flash close to the PT colouring without being too harsh, but i have made another attempt and i have been able to get the colouring closer to the PT but it doesn't jump out at you.