True ligaments are like fiber tape and are not elastic. Collateral ligaments are short, white and act as hinges.
Yellow ligaments are muscle remnants are used to have nucleated cells, but lost them. They tend to be like bungee cords. Yellow ligament is also found in the sheet form and is bouncy like a trampoline.
Ligaments are very strong non contractile connective tissues that are responsible for stabilizing the joints