🎨 Colour Vision Test
A 10-plate colour-vision screening in the classic dot-mosaic style — every plate is generated fresh on canvas (never the same test twice), with matched-luminance dots so only colour can reveal the hidden number. Six plates probe the red–green axis, three the rarer blue–yellow axis, and you get a per-axis verdict with a review of every plate.
Good light & brightness — raise screen brightness, avoid glare on the screen.
Turn OFF night filters — Night Light / Night Shift / f.lux shift colours and break the test.
Sit at arm's length — ~60–75 cm from the screen, look at each plate for a few seconds.
Don't squint or lean in — if you can't see a number after ~5 s, pick “I see no number”.
A screen test is only a screening: results depend on your display, its colour profile and ambient light — it does not replace an eye-care professional's examination with printed plates or an anomaloscope. If results keep flagging an axis, do get a proper check-up.