Why is Jesus Christ our righteousness?

Christ is described as the perfect fulfillment of the law, having lived a sinless life and accepted the penalty for our sins on the cross. In Colossians 1:10-12, we are reminded that we are made worthy not by our works, but through His righteousness. When we believe in Him, we are declared just before God because Christ bore our punishment and satisfied God's wrath. His righteousness guarantees that we are no longer condemned but accepted as God's children, ushered into His favor by grace alone, not by our endeavors.