Quarks are fundamental subatomic particles that serve as the building blocks of protons and neutrons, which constitute matter. They are classified as fermions and come in six flavors: up, down, charm, strange, top, and bottom. Quarks carry a property known as color charge, which is mediated by gluons, the force carriers of the strong force. A common misconception is that quarks are bosons; however, they possess a spin of ±1/2, confirming their classification as fermions. For a more comprehensive understanding, resources like Wikipedia or lectures on particle physics are recommended.