A screening, not a test you pass
Twenty dot plates, each with a number hidden in the colors. How many you can read says something about how your eyes separate color — and nothing about how well you see.
This is a screening, not a diagnosis — screens and lighting affect color rendering; for a real assessment see an optometrist.
Take it on a screen at normal brightness, in even light, with no blue-light filter or night mode on. A tinted screen changes what the plates measure.
Every run builds its own plates from a fresh random seed, so there is no fixed set to memorize and a retake is genuinely a new test. Three of the plates are checks: one kind anyone can read whatever their color vision, and one kind with no number hidden at all. Say what you actually see — including “no number”.
Unlike the other assessments here, this one cannot be taken without seeing the plates — the plates are the question. Nothing about them is described in text, deliberately.