# Isaac Newton established white light is composed of seven colours - ROYGBIV - red - orange - yellow - green - blue - indigo - violet --- - **Keywords:** - [[Colour]] - **Related:** - **Reference:** - [[newton1704OpticksTreatiseReflexions|Newton, I. (1704). Opticks: or, A Treatise of the Reflexions, Refractions, Inflexions and Colours of Light.]] - [Smithsonian: The Science of Color](https://library.si.edu/exhibition/color-in-a-new-light/science)