Periwinkle is a combination of blue and violet. It is sometimes referred to as lavender blue. Periwinkle is sometimes described as a pastel tint of indigo.
Periwinkle can vary within the blue and violet spectrum and in terms of light and dark shades. The definition of periwinkle ranges from the personal or impressionistic, several shades and mixtures of blue and violet are described by designers as periwinkle, to highly precise. For instance, the hexadecimal system, commonly used for defining color on the world wide web, defines periwinkle as follows: RGB values of 204, 204, 255 and the CMYK color values of 0.2, 0.2, 0, 0.