Yes, there are indeed antiparticles for quarks, known as antiquarks. Antiquarks have the opposite electric charge and color charge compared to their corresponding quarks. For example, the antiquark counterpart of an up quark (which has a charge of +2/3) is an anti-up quark (which has a charge of -2/3).
The concept of antiquarks arises from the framework of particle physics known as the Standard Model. Antiquarks are an integral part of the quark model and are essential for maintaining the overall conservation laws, such as electric charge conservation.
When a quark and an antiquark combine, they can form mesons, which are composite particles consisting of a quark-antiquark pair. For example, a combination of an up quark and an anti-down quark forms a meson called a pion.
It's important to note that quarks and antiquarks have fractional electric charges, which is a unique feature of the strong force that mediates interactions between them. This fractional electric charge distinguishes quarks and antiquarks from other elementary particles like neutrinos and electrons, which have integral electric charges.
In summary, just as there are antineutrinos and positrons as the antiparticles of neutrinos and electrons, respectively, there are also antiquarks as the antiparticles of quarks.