Middle gray
A neutral tone halfway between black and white, used to calibrate cameras and prints
No single value: Middle gray is a material, and its colour varies. The background shows its family, grey.
Middle gray is a neutral shade that sits about halfway between black and white in perceived lightness. In photography and printing, it is usually defined as reflecting 18% of visible light and is used as a standard reference for exposure and calibration.
- Middle gray is typically set at 18% reflectance
- Used to calibrate cameras, light meters, and monitors
- Defined as N5 in the Munsell system
- Standard reference in photography and printing
What colour is Middle gray?
Middle gray is a neutral colour that appears to be halfway between black and white when judged by eye. It is not a single fixed value, but in photography and printing, it is usually set at 18% reflectance of visible light. This makes it a practical standard for calibrating cameras, light meters, and monitors, helping to ensure that images are exposed and reproduced accurately.
Where does Middle gray come from?
The idea of middle gray comes from studies of how people perceive lightness. Early in the 20th century, scientists debated whether human vision responds to light in a straight line, a logarithmic curve, or a curve of squares. The Munsell colour system, developed in the early 1900s, placed its middle neutral gray at N5, halfway between its black (N1) and white (N9) steps. Later research and standards, including the CIELAB system, refined how middle gray is defined for different uses.
How is Middle gray made?
Middle gray is not a pigment or dye, but a standard tone defined by its reflectance or digital value. In photography, an 18% gray card is used to provide a reference point for exposure. On computer screens, middle gray can be shown as a specific RGB value, but the exact appearance depends on monitor calibration and viewing conditions.
Where Middle gray is used
Photographers and printers use middle gray as a reference to set correct exposure and colour balance. A gray card or colour reference card is placed in a scene to help cameras and light meters judge the average light. In digital imaging, middle gray is used to calibrate screens and ensure that tones are reproduced as intended.
Shades and relatives of Middle gray
There are several ways to define middle gray, depending on the system and context. In the Munsell system, N5 is the middle neutral gray. In digital imaging, a 50% gray on a monitor calibrated to a 2.2 gamma curve has a specific RGB value. The exact appearance of middle gray can change with lighting and display settings.
Questions people ask about Middle gray
What colour is middle gray?
Middle gray is a neutral tone that appears halfway between black and white in perceived lightness. In photography, it is usually defined as reflecting 18% of visible light.
Where does the name 'middle gray' come from?
The name comes from its position between black and white on a lightness scale, making it the 'middle' gray. It is used as a standard reference in visual arts and imaging.
How is middle gray used in photography?
Photographers use an 18% gray card as a reference to set correct exposure and colour balance, helping cameras and light meters judge the average light in a scene.
Is middle gray always the same value?
No, the exact value can vary depending on the system. In photography, it is typically 18% reflectance, while digital displays may use different RGB values based on calibration.
Good reading and sources
The facts on this page come from the Wikipedia article "Middle gray", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). Rang rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes. The swatch is an approximation: named colours are not fixed standards, and every screen shows them a little differently. If something is wrong, tell us. Last refreshed 2026-10-03.
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