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Which of the following are the primary colours of light ?

June 1, 2025 by rawan239

Which of the following are the primary colours of light ?

Yellow, Red and Green

Blue, Red and Green

Violet, Red and Yellow

Indigo, Violet and Green

This question was previously asked in

UPSC NDA-1 – 2021

Download PDF Attempt Online

The primary colours of light are Blue, Red, and Green.

Primary colours of light are those colours that cannot be produced by mixing other colours of light, and from which a wide range of other colours can be created by mixing. In additive colour mixing (mixing of light), the primary colours are Red, Green, and Blue (RGB). This is the basis for how colours are displayed on screens (TVs, monitors, phones).

The combination of the three primary colours of light in equal proportions results in white light. Combining any two primary colours produces a secondary colour: Red + Green = Yellow, Red + Blue = Magenta, Green + Blue = Cyan. These secondary colours of light are the primary colours of pigment (in subtractive mixing).

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