Shoulder belts in '67 GTX convert.. Same color ??

Decode of build sheet indicated that My '67 GTX convertible came with shoulder belts. I think I remember removing some belts that were black, but
rest of belts are dark blue to match the Cars interior. Would it have been correct for the shoulder belts to be black, and, how were They mounted??

I ordered a 1967 GTX and picked it up on Dec.1/1966 it was a 2 door hard top in 67 there was no shoulder belts.I believe 1967 was the first year for mandatory seat belts.

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Decode of build sheet indicated that My '67 GTX convertible came with shoulder belts. I think I remember removing some belts that were black, but
rest of belts are dark blue to match the Cars interior. Would it have been correct for the shoulder belts to be black, and, how were They mounted??

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Weren't they super long ones mounted behind the back seat? Bad for passengers in back