Óscar Vega primarily uses oil on canvas, employing a limited palette of red, white, and black, and occasionally resin. He combines painting, drawing, and sculpture from a self-taught perspective rooted in his background in philosophy and psychology. He uses understated techniques, interpreting figuration with graphic touches, creating endearing figures and thematic collections. He pays homage to masters, incorporating ready-made objects into his chromatic schemes. His style acknowledges the imperfections of the creative process and rejects digital coldness. His works overflow with strength, rebellion, and a profound social commitment, generating a powerful emotional response, irony, and a challenging beauty with a humanist and nonconformist message.