Credit: Thegreenj – Own work, CC BY-SA 3.0, Ĭrucially, this range of numbers is the same whether you’re working in a smaller or larger colour space. The image on the right has a higher bit depth. Nowadays, most computers work with colour that’s 24-bit, which means each red, green and blue sub-pixel can be at one of 256 brightness levels, making for a total of 16,777,215 colours. That was because the processors at the time weren’t powerful enough to cope with the calculations required to show millions of colours all the time. If you look back at old computers and games consoles, you’ll see the limited palette of colours available. In any digital representation of colour, each colour is represented by a number, and the total number of colours is finite. Related to colour space is the idea of colour depth. PC users can also just switch a high-gamut monitor into a low-gamut mode. This means you can buy a high-gamut monitor and everything should look normal until you use an app that specifically extends into the high-gamut range, at which point you’ll get the benefit of the monitor’s extended capability. Since macOS natively recognises Adobe RGB, it can properly support high-gamut monitors for all apps. Related: Best free photo editing softwareĪs such, you should only buy a monitor capable of producing Adobe RGB – or any other extended colour space – if you have a specific reason to work within that colour space: for example, if you’re dealing with high-end printers used in magazine production or if you work in cinema and broadcast TV. It will only be in certain apps that recognise Adode RGB, such as Photoshop, that colours will look correct. Moreover, because Windows doesn’t natively recognise the Adobe RGB colour space, using an Adobe RGB monitor for your PC will result in your monitor making colours look over-saturated this is because the monitor is taking normal sRGB colours and stretching them out to fit the Adobe RGB space. Since nearly all screens – from phones to TVs – conform to the sRGB colour space, you actively don’t want to be using an Adobe RGB monitor to edit pictures and video if its intended use is for all those other sRGB screens, since all the colours will look wrong on those displays. However, this isn’t just an over simplification it’s wrong. It means they’re able to cope with the extra colours that colour spaces such as Adobe RGB require.Īll this may seem to suggest that buying a high-gamut monitor that can deliver Adobe RGB colour is the best option. This is what is being referred to when monitors are said to be ‘wide gamut’. This means it can show a larger range of colours (about 50% CIE XYZ), with the most obvious advantage being in the cyan-green hues. Meanwhile, Adobe RGB was developed to better represent the full range of colours achievable on CMYK printers. However, it covers only about 30% of the CIE XYZ colour space. The former is the universally accepted standard for most computing applications and the internet. The two most common colour spaces in computing are sRGB and Adobe RGB. Related: Best Monitors Adobe RGB and sRGB Credit: BenRG and cmglee –, CC BY-SA 3.0, The bigger the triangle, the greater range of colours in that colour space.Ĭolour spaces. This mapping, known as the colour gamut, is defined mathematically, but can also be visualised as an area – generally a triangle – that sits inside the CIE XYZ colour space. Other colour spaces can then be mapped onto this ideal representation of all the colour we can see. This represents the chromaticity or tone of the colour space, with the Z component (brightness) not visually accounted for. Credit: BenRG – File:CIExy1931.svg, Public Domain, Developed back in the 1930s, this model is generally represented in 2D as a horseshoe shaped spread of colour on an XY axis. The most common of these is the CIE XYZ colour space, which defines the number of colours the human eye can distinguish in relation to the wavelengths of light. As such, a true colour space is defined by mapping that colour model to a standard real-world colour reference standard. Such a model on its own is abstract, with no specific relation to real-world colours. An RGB representation of black is (0,0,0) while red would be (255,0,0). RGB is used for computer displays where each pixel is made up of a trio of red, green and blue dots, while CMYK refers to the four standard colours used in printers: cyan, magenta, yellow and key (black). This is an abstract, mathematical way of defining colour, with the two most common being RGB (red, green, blue) and CMYK (cyan, magenta, yellow and key – or black). Where things become more complicated is when looking at the more exact definition with reference to computers.
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