Thank you all for your responses   ... View more

I totally agree with you about the use of recording formats. In the case where only a solid color is recorded (as in your cut slice example), the PNG-8 or GIF formats are suitable. For the case of a cut-out image where we need transparent pixels, the PNG-24 will be perfect. But for a recording of an entire page with solid areas, + images + gradients, etc, the JPG is still very practical:) I did not think that the JPG affected solid colors even in 100% quality. Now I know it. ... View more

in the original post, yes ... View more

Someone even tried with Affinity and the problem is identical to Photoshop. You confirm what I thought: it must be a concern related to JPG compression algorithms ... View more

it's not a profile conversion: I have a document in sRGB and I save it in jpg, then I open the JPG in question and the hexadecimal code has changed. There is no profile or workplane color conversion. I would be curious to know the result if you try the experiment. ... View more

with the exported jpeg re-opened in Photoshop ... View more

in photoshop ... View more

- I open a document -I check that the workspace is in sRGB -I check that the document profile is in sRGB -I create a rectangle with a vector shape in orange # f18825 -I export for the web in JPG with all options imaginable, or even without option at all and the color becomes # f28725 ... View more

I advanced my research by passing everything in sRGB and the result of my color with a JPG export is always different. I am very precise in the color code because it falls within the framework of a graphic charter. Otherwise, visually, we do not see the difference unless we sample with the pipette. A colleague has the same results as me, and he also tried with Affinity for the same conclusion: the JPG export alters the color, while the PNG is respectful of the original color. I draw a solid color of # f18825 I export for the web in PNG: I find the same color # f18825 I export for the web in JPG: my color turns into # f28725 It does not matter if I incorporate the color profile, I use the profile of the document or if I uncheck everything: I can not get the color # f18825 ... View more

First of all thank you very much for your answers and the time you use to try to find a solution to my problem. I work for a web document. I have a workspace in sRGB. The color profile is in sRGB. I draw a solid color of # f18825 I export for the web in PNG: I find the same color # f18825 I export for the web in JPG: my color turns into # f28725 It does not matter if I incorporate the color profile, I use the profile of the document or if I uncheck everything: I can not get the color # f18825 I still do not understand… ... View more