How to make white collar white from a white-color mixed jacket

[user1481131823]

Hi I have a quilted jacket with white faux fur collar and navy body. I washed it in hot water with other navy color clothes. So the white collar is light blue now. I wonder how to make the white collar white again. Thank you!!

It may not work, but either;

Wash the jacket again with some colour catcher sheets (preferably 2 or 3).

Using a shallow bucket/washing up bowl etc, soak just the collar in a solution on non-chlorine bleach (something like Vanish crystal white).

I feel your pain, I have never understood why clothing manufacturers make clothing with white bits and then don't make them detachable.

DAZ washing powder tried to address this problem a few years ago by introducing a "dye-lock" technology in its washing powder, I don't know if it still has this (it was about 10 years ago that they run the adverts for it). I also don't know how well it worked/would work compared to other powders.

*in not on