The Power of Observation
A color-matching game for preschoolers will often require children to have a keen sense of observation. The games listed here are all about developing that skill of observation.
Think Blue: Gather together pictures of things that are all the same color, such as blue. Show the pictures to the children and discuss the blue color in each of the pictures. Ask the children to look for blue in their clothes, the classroom, outdoors, etc. Ask them to name other things that are blue. When introducing colors for the first time, try to play this game using other colors once a week. If your children are older, try introducing a new color every day.
Flashlight Findings: Turn off the lights in your classroom and have all of the children sit very still. Shine a flashlight around the room very slowly and in a whispered voice, tell the children you are looking for something red. Ask them to shout "HOORAY!" or another phrase when the flashlight finds something red. Once the children are more adept at distinguishing colors, allow each of them a turn with the flashlight.
Color I Spy: This is a preschool version of an old favorite. Start the game with this rhyme: "Riddley, riddley, ree, I see something you don't see: and the color is _________." The children get three tries to guess the object you see. Continue the game, asking one of the children to say the rhyme and choose a color.