John Players — John players t shirt had blue strap, after one wash it loss it's colour.

Address:

Reliance treads, at B road sardarpura, jodhpur rajasthan

John players white t-shirt, but after one wash blue color strap lose it's colour and now this white t-shirt is not usable. Why you use blue color fabic on white t-shirt?
I purchased it in 899 rupee from trends, B main road, sardarpura, jodhpur rajasthan.