What color are these belts?

[blindbug]

So, I’m slowly updating parts in my 86’ C10 and came across a guy selling interior parts out of a blue interior 85’ C10. The seat was a damn near perfect match to my interior, if just a bit light. However, the outside belts are confusing me.

These belts are a lot darker than my stock belts, and while I thought it could have been faded, the plastic and the fabric match up so I don’t think it’s that. See the attached pictures for the belts I’m talking about (after I cleaned them) and the seat that accompanied them (next to my torn up old seat). I am also including a shot of the seat in my truck with my STOCK belts (which are much brighter blue).

I will also note that the belts pictured have a different hanger than the belts in my truck. These belts have a wider, silver hanger... but my stock belts have a narrower black one. I also believe that the manufacturers differ (though I may be incorrect... I'm not at home to check).

Any thoughts on what color these belts (the ones on the ground) actually are?