Which force is responsible for the colour confinement of quarks?

Colour confinement is one of the most distinctive features of the strong force. Quarks carry color charge and are bound together by gluons in such a way that isolated quarks have never been observed in nature. When quarks are pulled apart, the force does not weaken like gravity or electromagnetism; instead, it remains strong enough that new quark-antiquark pairs form. This is why only composite particles such as protons, neutrons and mesons appear in experiments. Confinement is a major subject in quantum chromodynamics and particle physics research.