Color space

What it means

A color space describes which colors a file can contain and how the numbers in the file map to real colors. It combines a gamut, the set of reachable colors, with a white point and usually a transfer curve. Without that information, the same file can look different on different screens.

Standard HD and most web video use Rec. 709. HDR and many wide-gamut workflows use Rec. 2020, which covers far more saturated colors. Camera log formats often have their own wide color spaces designed to hold everything the sensor can see.

Displays have color spaces too, and a mismatch between file and screen causes washed-out or oversaturated pictures.

How it works in practice

Most action footage in standard profiles is already Rec. 709 and needs no conversion. When you shoot in a log profile or HLG, the editing software must know the source color space so it can convert correctly. Many editors read this from metadata, but sometimes you set it by hand.

For mixed timelines, choose one working color space and convert every clip into it, then export to the delivery space, usually Rec. 709 for web. Color-managed editors do this automatically, which saves a lot of guesswork when matching cameras.

Checking a test export on a phone and a laptop catches most color space mistakes before publishing.

What to watch out for

Mismatched tags are a common problem. If an export is tagged with the wrong color space, players may show faded or neon colors even though the edit looked right. Washed-out uploads are often a tagging issue rather than a grading one.

Wide gamuts do not help if you deliver to a narrow one. Grading in Rec. 2020 and exporting to Rec. 709 without proper conversion clips the most saturated colors. Keep the conversion steps explicit, and check exports on more than one device, since phone screens often stretch colors on their own.