D-15 arrangement
Arrange 15 coloured caps in order. About 3 minutes. Quick screen for moderate to strong colour difficulty.
100-Hue arrangement
Order 81 caps across four trays. About 10 to 15 minutes. Finer hue discrimination, with an error score.
Dot plates
Read numbers hidden in coloured dots. About 2 minutes. Original plates in the style of Ishihara, not the Ishihara book.
Important
These activities are for education only. They are not equivalent to clinical colour vision tests, which use calibrated materials under standardised lighting. Screen type, settings and room light change the colours you see. Results are not valid for work, licensing, driving or aviation standards. If you are worried about your colour vision, if it has changed, or if it differs between your eyes, please book an assessment with an eye care professional. No data is stored or sent.