You are about to take part in a scientific study of colour vision and colour matching, conducted by Semmelweis University. Please read this before you begin.

• Purpose. We study how people perceive and match colours. Your gameplay data (colour matches and timing) and the details you provide (date of birth and gender) are used for research and may be published in anonymous, aggregated form in scientific journals.
• Anonymity. You are identified only by a random 6-character ID. We do not collect your name. Your email is used only for ID recovery and optional reminders and is never published.
• Voluntary. Taking part is entirely voluntary. You may stop at any time and skip any task, without giving a reason and without any consequence.
• Withdrawal. You may request deletion of your data at any time by emailing konig.janos@semmelweis.hu.
• Data handling. See our Privacy Policy for full details.
• Ethics approval. This study was approved by the Semmelweis University Regional and Institutional Committee of Science and Research Ethics (SE RKEB 167/2025).

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Mix paint. Match the colour.

Five pigments, one target shade — how close can your eye get? Try one round right now, no sign-up needed.

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