Colorimetry

Training, a self-test, and a measurement tool — built for the people who stand at the panel with a spectro in hand, not for a colour science lecture hall.

Colorimetry TrainingWhy Lab exists, illuminants, instrument geometry, the four Delta E formulas, reading the difference
Testing / Quiz10 questions, 70% to pass, retake any time
Color MeasurementsDelta E calculator — CIE76, CIE94, CMC l:c, CIEDE2000, master panel, tolerance, plain-language direction
Colour Vision Self-CheckInformal hue-arrangement test, inspired by the Farnsworth D-15 — Beginner and Advanced levels