The present disclosure provides a composition for treating keratin fibers, for example, human keratin fibers such as the hair. The present disclosure provides a composition for dyeing keratin fibers, comprising: at least one compound X and at least one compound Y, wherein at least one of the compounds X and Y is a silicone compound, wherein when X and Y are placed in contact with each other they react together via a hydrosilyation reaction, a condensation reaction, or a crosslinking reaction in the presence of at least one peroxide; and at least one alkoxysilane comprising a single silicon atom.