On boots that can happen where it is a thinner, cheaper leather that is layered (as opposed to the top layers of hide for fancy dress shoes). It will be a blue colour underneath, where the dye isn’t in very deep, no?
Weird, that just sounds like they weren’t dyed very deep. I suppose they were veg tanned rather than chrome? Do you wear them with ripped jeans and silver bracelets?
On boots that can happen where it is a thinner, cheaper leather that is layered (as opposed to the top layers of hide for fancy dress shoes). It will be a blue colour underneath, where the dye isn’t in very deep, no?