Reference implementation The audited reference color game uses HSB values, converts them to RGB and CIE Lab, then scores CIEDE2000 Delta E with a hue-sensitive product curve. Dialed Color matches that measurement model for the random HSB color game; the reference site's separate logo/character Color2 dataset is a curated-content task, not a random target task.
Target source Solo and challenge targets are seed-generated pseudo-random HSB colors. Daily targets use date-based fixed palettes or date hash offsets, so the same seed gives the same colors.
Measurement The app converts target and submitted colors into RGB and CIE Lab coordinates, then measures color difference with the CIEDE2000 Delta E formula.
Score curve The round score maps CIEDE2000 color difference onto a 0-10 assessment score with a reference-style product curve. Delta E is standardized; the 0-10 curve is not a CIE standard.
Report use A report can discuss hue drift, saturation/brightness drift, average Delta E, and consistency across rounds. It should not claim clinical color vision, brand-color literacy, or long-term memory ability from one five-round run.
Limits Screen calibration, brightness, color profile, ambient light, and the user's display all affect results.
Authority note These sources explain the measurement concepts used by the product. They are citations, not official certification, endorsement, or clinical validation of this test.