Its a easy fix
All the pull straps are are marine grade vinyl that are folded over with the two raw edges meeting in the middle of one side of the strap then they are top stiched I would glue the fold down and then top stich Perhaps even inlaying somthing inside to give it more durability
Then you loop it with your raw edge seam to the inside then its just stapled to the under side of the cushion
As for color if you make two new ones with something reasonably close to the colors of your interior it'll look fine

Hope this helps