Mid-key values give Leon Kroll its characteristic quietness - nothing blazes, nothing disappears. Leon Kroll builds on cool foundations: the palette favours the blue-cyan-green arc. Chroma is moderate: colours carry enough saturation to be read as colour, but the palette stops well short of garish intensity. #315165 delivers the chromatic peak at only 3.8% - a small shot of colour with outsized visual impact. The full value range is 55 units: broad enough to build convincing three-dimensional form. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. Palette 4 sits within the larger chromatic argument that Leon Kroll's complete body of work advances.