When ordering a custom leather interior you can opt to have your stitching color match your main color (non accented) , or select a contrasting thread color (accented).
Not all patterns have the same amount or layout of color selectable accented stitching in their design so make sure to reference the images and schematics for the specific pattern you are ordering.
Most newer patterns feature a double stitched perimeter seam with additional single seam details on the inlay however older patterns will typically feature only the perimeter double stitched seams as the designs were not as complex.
Some classic patterns were made with only a perimeter top stitch (single seam) or perimeter piping (welt).