This is a science center activity where children match hues of color. I collect the free paint sample cards from the hardware store with a pair of each color. Children find the matching hues of each color.
Just a little terminology: A color hue means a variation of a color, where white or black or another color has been added to it. A tint of a color is a lighter variation, where white has been added to it (in other words, pale hues). A shade of a color is a darker variation, where black has been added to it (darker hues).