What is my color depth?
Color depth is how many bits the browser reports for screen colors (often 24-bit). We also show pixel depth when available.
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Color depth
Bits per pixel reported by the browser
Color depth is how many bits the browser reports for screen colors—often 24-bit (true color). We also show pixel depth when the API provides it. These fields describe the screen color buffer the browser sees, not necessarily a calibrated wide-gamut pipeline.
Most modern desktops report 24 even when the panel can do more in other apps.
Depth vs gamut
Color depth is not the same as Display P3 / wide gamut support. Use the color gamut tool for P3/Rec.2020 media-query results.
You rarely change color depth manually on modern consumer OSes; drivers and displays negotiate it.
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See also screen resolution vs viewport.
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Frequently Asked Questions
What is color depth?
Color depth is the number of bits used to represent color. 24-bit usually means about 16.7 million colors.
Color depth vs pixel depth
Browsers expose screen.colorDepth and sometimes pixelDepth. They are often the same value.
Why do most desktops show 24?
True color (24-bit) is the common default for modern operating systems.
Does this equal wide color gamut?
No. Bit depth and gamut (sRGB vs P3) are different. Use the P3 check for gamut.
Can I change color depth?
Some OS display settings allow different color formats. Most users leave the default.