In the specs for the monitors above we've listed the colour coverage that each provides. What colour coverage you need for your photo editing will depend on whether you're a professional or enthusiast. Monitor colour coverage can a confusing topic at first because several different colour spaces exist, and some of these contain more colours than others.
A colour space is a specific organisation of colours which, in combination with colour profiling, supports reproducible representations of colour. Looking at the best monitors for photo editing, you'll see that they cover a percentage of different colour spaces – the higher the percentage, the more of that colour space they can produce. Colour spaces include sRGB, Adobe RGB,
Why it can be confusing is that one monitor might be certified at 100% sRGB, the standard 8-bit colour space for web display, but that still isn't the best colour colour coverage possible. The Adobe RGB spectrum and DCI-P3 are broader spaces than sRGB, thus with more colours. As a general rule, we'd advise choosing a monitor for photo editing that covers at least 90% of sRGB and 70% of Adobe RGB. These colour spaces are industry standards. Professionals, especially those working on projects that go to print or involve working with other photo editors will want higher than this – ideally over 90% of Adobe RGB.