Colour gamut describes the spectrum of colours that a display can reproduce. Think of it as the palette available to your screen. A larger gamut means the display can show a broader range of hues, from deep reds to bright cyans, without losing detail or accuracy.
Gamut is measured against standardised colour spaces. The most common reference is sRGB, a baseline used across the web and consumer displays. Professional monitors often aim for wider spaces like Adobe RGB (used in photo editing) or DCI-P3 (used in cinema and high-end video production). A display might achieve 100% sRGB, 95% Adobe RGB, or 98% DCI-P3, for example.
In practice, colour gamut matters most if you edit photos, design graphics, or watch high-quality video content. A laptop screen with 45% NTSC gamut will look washed out next to a monitor with 72% NTSC. Streaming films or scrolling social media? The difference is less noticeable. However, even casual users benefit from a wider gamut because it improves colour accuracy across everyday tasks.
When shopping, check the spec sheet for gamut coverage percentages. Look for at least 100% sRGB if you do any creative work. IPS and OLED panels typically offer better gamut than TN panels. High refresh rate gaming monitors sometimes sacrifice gamut for speed, so verify both specs if you want both performance and colour accuracy.