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Thread: What Color Space for posting on forum and web?

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    What Color Space for posting on forum and web?

    Not sure where to post this: I use Prophoto RGB as my color space when working on images and printing them. When I down size them and convert to JPGs for web use, I sometimes leave the images as Prophoto RGB and sometimes I convert to sRGB color space. Lately I have been leaving the images as Prophoto, but when posted here on the forums, and on my own web site, I note the images are not as color saturated as they appear on my color managed PC at home. Any advice what space to use for web JPGs? Any help much appreciated.
    Thanks
    Dave in NJ

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    Re: What Color Space for posting on forum and web?

    Quote Originally Posted by gurtch View Post
    I use Prophoto RGB as my color space when working on images and printing them. When I down size them and convert to JPGs for web use, I sometimes leave the images as Prophoto RGB and sometimes I convert to sRGB color space. Any advice what space to use for web JPGs? Any help much appreciated.
    Thanks
    Dave in NJ
    Dave

    I too use Prophoto RGB but all web sites expect sRGB so for archive Prophoto for display sRGB ... they assume that most of the devices out
    there cannot handle even Adobe RGB ... that is changing but the convention has not.

    Regards,

    Bob

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    Senior Member bradhusick's Avatar
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    Re: What Color Space for posting on forum and web?

    If you want your images to look right on most screens you should soft-proof and convert to sRGB.
    Brad Husick

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    Re: What Color Space for posting on forum and web?

    Quote Originally Posted by gurtch View Post
    Not sure where to post this: I use Prophoto RGB as my color space when working on images and printing them. When I down size them and convert to JPGs for web use, I sometimes leave the images as Prophoto RGB and sometimes I convert to sRGB color space. Lately I have been leaving the images as Prophoto, but when posted here on the forums, and on my own web site, I note the images are not as color saturated as they appear on my color managed PC at home. Any advice what space to use for web JPGs? Any help much appreciated.
    ProPhoto RGB is a 16 bit-per-component color space ... you should never use it for JPEG images as they are 8 bit-per-component files. Using ProPhoto RGB on JPEG files can cause some pretty odd imaging problems as the numbers "fold" around the limits of the 8 bit integer boundaries.

    On the other hand, ProPhoto RGB is the RIGHT color space for editing as it has plenty of room to do adjustments and transformations without clipping. Be sure you are editing 16bit files with ProPhoto RGB. If your masters are 8bit per channel, either use Adobe RGB (1998) as your working color space for editing, or promote the masters to 16bit per channel before editing.

    For display on the web, the correct color space to use is sRGB. It is the standard that all web browsers expect when rendering photos even in the absence of a color profile.

    When you're outputting files from your 16bit-per-component edit masters for the web, the correct procedure to use is as follows:

    0- Save your master file.
    1- Convert color space from ProPhoto RGB to sRGB
    2- Convert component depth from 16-bit to 8-bit
    3- Save a copy to web file in JPEG format

    The basic rule is to always convert the color space before you convert the component depth.

    G

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    Senior Member Lars's Avatar
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    Re: What Color Space for posting on forum and web?

    sRGB for sure. Most devices incl phones, tablets and consumer displays target sRGB these days so even for uncalibrated displays you have a fair chance of having your pictures looking decent. With IPS almost everywhere in the mobile world we have a much better chance of our images looking good these days, compared to 5-10 years ago.
    Monochrome: http://mochro.com

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    Re: What Color Space for posting on forum and web?

    Thank you all. I will now use sRGB for web images.
    Dave

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    Re: What Color Space for posting on forum and web?

    I have a persistent problem that doesn't seem to make sense. I work in ProPhoto RGB, but convert all images to sRGB jpegs for web output, either using lightroom's export, Photoshop's save-for-web, or just saving-as in Photoshop.

    Everything looks fine when using a color-managed browser like Safari, but when using Firefox (which is theoretically color managed, but preposterous to get to work right) and wide-gamut display, the images all look hyper saturated.

    They look really bad—when they've been shared on various blogs, they elicit snarky complaints about hideous HDR effects.

    Sometimes the images have been shared on a site that strips the tag, in which case they look hyper saturated even in Safari. But other images on the same site often don't suffer the same problem.

    Thoughts?

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