About the HSB colour model and colour brightness
- The RGB and HSB colour models differ only in the way colours are represented in terms of colour notation and handled in software and applications.
- Both the HSB and RGB colour models involve mixing red, green, and blue light to produce other colours.
- HSB is popular because it offers an intuitive method for selecting and adjusting colours within applications like Adobe Creative Cloud, which is commonly used in design, photography, and web development.
- The HSB colour model can be used to describe any colour on a TV, computer or phone screen.
In the HSB colour model:
- Hue refers to the perceived difference between one colour and another and accounts for colour names such as red, yellow, green or blue.
- Hue can be measured as a location on a colour wheel and expressed in degrees between 00 and 2590.
- Saturation refers to the perceived difference between one colour and another in terms of purity.
- Saturation is measured between a fully saturated colour (100%) and an unsaturated colour that appears dull and washed out, eventually reaching a monochromatic grey tone (0%).
- A fully saturated colour is produced by a single wavelength or a narrow band of wavelengths of light.
- On HSB colour wheels, saturation is typically shown to increase from the centre to the circumference.
- Brightness (colour brightness) refers to the difference between a hue that appears bold and vivid at maximum brightness (100%) and then appears progressively darker in tone until it appears black at minimum brightness(0%).
- Colour brightness is often evident in the distinction between how a colour appears to an observer under well-lit conditions compared to its more subdued appearance when in shadow or under poor illumination.