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What bit depth has sRGB?

Magenta81 Magenta81

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Magenta81 Registered since 13th May 2020
Fri 17-Sep-21 02:59 PM
I've done some research about solving out of gamut colors in sRGB. I came across a simple, unanswered question:

What's the (max.) bit depth of sRGB color space?

I've done some tests with Lightroom, Photoshop and Affinity Photo.
After editing an image with the Prophoto CS, I've exported it 3 times to sRGB (with the original size):


  1. Lightroom: 9,7 MB (no bit depth options)

  2. Photoshop: 9,5 MB (no bit depth options)

  3. Affinity Photo: 16,5 MB (sRGB - 16 bit)



All 3 images look the same. After importing them into photoshop, the info shows RGB/8.

Is it because of sRGB uses the smallest amount of colors, it always uses no more than 8 bit?

I'd like to clarify this, because I want to print some photo's by Whitewall (Europe), and they need an sRGB color space.

Thank you for your help?
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