Martín Rico y Ortega sits in the centre of the value range, lending the palette a sense of even, sustained light. Cool tones set the register here - the blues and greens easily outweigh any warm accents. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. Martín Rico y Ortega gives 26.4% of the composition to a single #B7A68E - a decisive chromatic anchor. The most saturated colour, #24170B, is reserved to 2.2% of the surface, where it acts as a focal punctuation. 66 units of value range underpin the palette's structural clarity: the eye always knows where light falls. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. In the context of Martín Rico y Ortega's full range of palettes, group 4 represents one movement in an ongoing chromatic dialogue.