In the color spectrum all of the lighter colors have a higher degree of light reflectancy than the darker colors. White is a tint and black is a shade. When a color is lightened by being extended toward white, the new color is called a tint. When a color is darkened by being extended toward black, it becomes a shade. Value is the second dimension of color.
Value distinguishes a light color from a dark one.
By adding white to any color or mixing a primary of lighter color with it we create a color of higher value. Orange is actually a value of red because of the addition of yellow, a lighter color. Various tints of pink are values of red. Chroma is the third dimension of color. Chroma is the quality that distinguishes a strong, dark color from a weak one.