Graditiles.

How do we solve puzzles?

Graditiles is a simple puzzle where colored tiles are rearranged until they form a gradient. It is also a research tool for studying how people perceive and organize color.

You can contribute by completing a short series of 10 puzzles. The experiment is anonymized and takes approximately 10 minutes.

Graditiles.

Restore the gradient

Normalized sRGB distance: 0–1. Minimum for this N: .

Arrange the tiles from the start color to the end color.
The start and end tiles are fixed. Drag an interior tile between two tiles to insert it, then check your order.

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The two edge tiles are fixed.

How to play

Welcome to Graditiles

Restore the color gradient by rearranging the tiles!

  1. The first and last tiles are fixed.
  2. Drag the tiles to change their order.
  3. Press Check order to verify your solution or see which tiles are in the wrong position.

Choose Practice, play today's Daily, or complete the 10-puzzle Experiment.

Research participation

Participate in the experiment

Complete a sequence of 10 color-ordering puzzles. For each puzzle:

  1. Arrange the tiles into a smooth gradient between the fixed end colors.
  2. Press Submit when you are satisfied with your arrangement. Your answer is final, even if it contains errors.
  3. The experiment will take approximately 10 minutes to complete.

Before beginning: Please disable night modes, color filters, HDR conversion, and automatic display adjustments.

Color vision

By continuing, you are consenting to your data being used for research purposes.
No personal information will be collected or shared.

Experiment complete

Thank you for participating!