The Color Practice app for the iPad contains puzzles ranging from c. 10 pieces to challenging puzzles with over 120 different colors. Below are a few examples. Click on a puzzle to solve it in the browser.

When solving these puzzles, a good strategy is to first find all the gray colors and arrange them onto the bottom row.

color chart blue easy 1 color puzzle
color chart cyan medium 1 color puzzle
color chart cyan easy 1 color puzzle
color chart cyan easy 2 color puzzle
color chart cyan easy 3 color puzzle
color chart cyan easy 4 color puzzle
color chart cyan medium 2 color puzzle
color chart cyan easy 5 color puzzle
color chart teal easy 1 color puzzle
color chart teal easy 2 color puzzle
color chart teal medium 1 color puzzle
color chart green easy 1 color puzzle
color chart green medium 1 color puzzle
color chart green medium 2 color puzzle
color chart lime yellow medium 1 color puzzle
color chart lemon yellow easy 1 color puzzle
color chart cadmium yellow difficult 1 color puzzle
color chart cadmium yellow medium 1 color puzzle
color chart sienna medium 1 color puzzle
color chart sienna medium 2 color puzzle
color chart yellow orange difficult color puzzle
color chart cadmium orange easy 1 color puzzle
color chart orange red medium 1 color puzzle
color chart orange red easy 1 color puzzle
color chart red medium 1 color puzzle
color chart vermilion difficult 1 color puzzle
color chart red easy 1 color puzzle
color chart scarlet red easy color puzzle
color chart magenta pink easy 1 color puzzle
color chart magenta pink medium 1 color puzzle
color chart magenta easy 1 color puzzle
color chart magneta lila medium 1 color puzzle
color chart magenta lila easy 1 color puzzle
color chart lila medium 1 color puzzle
color chart lila easy 1 color puzzle
color chart lila easy 2 color puzzle
color chart lila medium 5 color puzzle
color chart lila medium 2 color puzzle
color chart lila easy 4 color puzzle
color chart lila medium 3 color puzzle
color chart blue medium 1 color puzzle
color chart blue easy 2 color puzzle

For more hints and strategy, see also the guide section.