Blue is a colour, the perception of which is caused by light having a spectrum dominated by energy with a wavelength of roughly 440490 nm.It is one of the additive primary colours.Traditionally, blue has been considered a primary colour in painting,

Rubixanthin is also known as natural yellow 27,it is a natural xanthophyll pigment with a red-orange color found in rose hips.It is used as a food additive under the E number E161d as a food coloring.

Violaxanthin is a natural xanthophyll pigment with an orange color found in a variety of plants including pansies. It is biosynthesized from zeaxanthin by epoxidation.It is used as a food additive under the E number E161e as a food coloring.

Purple is used for the range of shades of color occurring between red and blue.In color theory, a purple is defined as any non-spectral color between violet and red.In art, purple is the color on the color wheel between magenta and violet and its tin