Does the color #7F00FF look different at 3:33 in the morning? We had to know.
// method
A single swatch of violet was displayed on a calibrated screen. Observers described it at noon, then again at 03:33.
// observation
At noon: “a purple.” At 03:33: one observer wrote only — “it is looking at me.” The screen had no camera.
// result
Color #7F00FF reclassified from passive to watching. Do not display after midnight.