Grayscale

Grayscale tests recognition speed with a very limited palette: black, white, and gray. A color appears in the background, and you must click the box with that same color. More boxes continue to appear, so each correct choice leads directly into another quick visual decision.

There is little room for hesitation because one mistake ends the attempt. The game turns a simple matching rule into a timing challenge, asking you to distinguish the displayed shade and select its partner before confusion takes over. Accuracy and rapid clicking work together here.

Watch the color that flashes in the background.

Click the box showing the same color.

Match only black, white, or gray as displayed.

Continue selecting matching boxes while more appear.

Avoid a single incorrect click, because one failure ends the game.