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I'm experiencing a strange effect where an image transform is causing my images to turn very dark when compared to their originals. I have ImageMagick and gd installed. The images are all sRGB. Some have Adobe RGB profiles, some have no profiles.
The image transform makes the jpeg 1200px wide, height auto, quality high. Not sure what could be causing the problem.
Setting 'preserveImageColorProfiles' => true, in craft/config/general.php solved the problem.
https://craftcms.com/docs/config-settings#preserveImageColorProfiles
Note that you need to be running at least Craft 2.6.2778 for this config setting to work.
The file probably has a color profile, which gets removed by Craft by default. You can tell Craft to preserve the color profile by setting the preserveImageColorProfiles in your config file.
'preserveImageColorProfiles' => true
preserveColorProfileconfig setting that might solve it?'preserveImageColorProfiles' => truecould solve it. But ideally, the file should have been saved for web without a profile, or srgb, so.. But there's also this weird thing where old versions of ImageMagick would make images a lot darker when converting from a colorspace without dynamic color range, to a normal jpeg (which has dynamic color space). But, I guess that's a more obscure case.