The phrase "gold piping" refers to a decorative trim made of gold-colored material, often used to enhance the appearance of clothing or furniture. Full definition
The dark coloured kit with excessive gold piping on the arms looks decidedly nautical. (footballkitnews.com)
Use silver and gold pipe cleaners to make festive sparklers that won't burn little hands. (thespruce.com)
The carbon fiber finish to the body is highlighted by copper accents to emulate traditional F1 livery and that color scheme gets thrown on the interior with specially trimmed bucket seats with gold piping and exclusive Lotus F1 Team Special Edition appliqués. (topspeed.com)