#137Mood Color Slow Drift

A near-monochrome pale wash whose colour temperature takes a slow random walk. Two-octave value noise in time — not a sine loop — steers a small chroma vector (C≈0.045–0.105) around the hue circle at a fixed pale Oklab L≈0.7, so the tint wanders imperceptibly and never repeats over ~25 seconds. A faint vignette and fine ~4% film grain give it the stillness of a lit surface, not an empty screen.