Values in Ivan Shishkin rest in the mid-range - neither dramatically lit nor steeped in shadow. Ivan Shishkin 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. #5D6132 delivers the chromatic peak at only 10.2% - a small shot of colour with outsized visual impact. A value spread of 65 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. 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 Ivan Shishkin's full range of palettes, group 19 represents one movement in an ongoing chromatic dialogue.