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RGB facts & stats

7 fact-checked facts about the RGB color model and light, each with the reason behind it. 5 more are in today's round and join this page after it closes.

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The basics

What color do you get by mixing red and green light?

AnswerYellow

In additive mixing, red and green light combine to make yellow.

What do red, green and blue light make when mixed at full intensity?

AnswerWhite

Adding all three primaries of light at full strength produces white.

Going deeper

Which hex color code is pure red?

Answer#FF0000

Hex codes list red, green, blue in pairs; FF is full red with no green or blue.

What color do green and blue light make together?

AnswerCyan

Green plus blue light gives cyan, one of the secondary colors of light.

How many types of cone cells do people with typical color vision have?

Answer3

Typical human color vision uses three cone types, sensitive to long, medium and short wavelengths.

Expert level

How many colors can 24-bit RGB represent?

Answer16,777,216

24 bits allow 2 to the power 24 combinations, which is 16,777,216 colors.

Roughly what range of wavelengths can the human eye see?

AnswerAbout 380 to 750 nanometers

Visible light spans roughly 380 nm (violet) to 750 nm (red).

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