In Un día verde, Blas immerses the viewer in a monochromatic vision where shades of green dominate the scene. Figures, animals, and symbols emerge and dissolve within the same tonal field, evoking a dreamlike environment that oscillates between the organic and the surreal. The overlapping imagery suggests coexistence and transformation, turning the canvas into a meditation on fertility, rebirth, and the interconnectedness of all beings. Through this chromatic choice, the work gains a mystical atmosphere, inviting the viewer to reflect on nature as both a physical and spiritual force.