Color spaces, color gamuts

No image device is capable of capturing and displaying the full spectrum of colors visible to the human eye. Consequently, image devices record, edit, display, or output a subset of those colors. This range of reproducible color is known as the device’s color gamut. Additionally, devices capture, process, and display different ratios between the lightest and darkest parts of an image, from pure black to brightest white. This luminance range is known as dynamic range. Together, these attributes define an image’s or device’s color space

https://support.apple.com/en-au/guide/motion/motn3f5342e9/mac

These terms are often used interchangeably and become a bit mangled.

Or put another way:

• Colour space - A mathematical model. e.g. sRGB, DCI-P3, Rec.2020
• Colour gamut - The range colours of a device or system can handle.
• Colour format - The syntax for representing colours, which depends on the colour space. e.g. RGB, HSL, etc. exist in the sRGB colour space.

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