Mid-key values give Éloi Firmin Féron its characteristic quietness - nothing blazes, nothing disappears. Éloi Firmin Féron builds on cool foundations: the palette favours the blue-cyan-green arc. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. The highest-chroma note - #BEA772 - appears at just 8.2%, deployed as a precision accent against the quieter ground. The full value range is 55 units: broad enough to build convincing three-dimensional form. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. This is palette 3 of Éloi Firmin Féron's sequence - a single chapter in a chromatic story told across many works.