Photoshop's new webp support under save-as copy produces images that are over saturated compared with the original in photoshop, and when compared to exported jpg files. More compressed webp files have more excess saturation. See attached screenshot (I was unable to upload the webp image itself, as this Adobe Support page does not accept webp uploads). The webp image is also visibly more saturated when re-opened in photoshop. in the image below, the JPG file looks identical to the original image in Photoshop, as expected.
Photoshop version 23.2.1
Windows 10 21H1
Open colour photograph in Photoshop (in my case the original was an 8-bit psd). Choose Save As Copy and choose Webp, choose 50% compression and save. re-open in photoshop or any colour managed software of your choice (I used a colour managed Irfanview) and compare that side by side with the original image in photoshop. The webp version will have more saturation than the original photoshop photoshop image.
Expected result: the webp version should show the same level of saturation and colour values to the original photoshop image.
TPinkerton • Adobe Employee, Mar 07, 2022Mar 07, 2022
Thanks, Paul. I think I'm now seeing the color balance shifts with some images (toward magenta) that you're seeing. We'll start looking into this right away. Something is going awry at the compression stage of the encoding process. I wish I could help with the direct forum replies, but that's unfortunately outside my area of expertise. If you can get that resolved and are able to resume posting files, I'd love to try and get a copy of the original image you used for your comparison. I'm using a ...