If the colors of the images that you upload appear different from what you see on your computer, keep in mind the following things:
Older PS versions have also had errors with the conversation, so it is also essential which PS version you are using.
As you can see in this thread, where the problem is described with the export function of Adobe Photoshop:
Also, sometimes, instead of RGB, the monitor profile is embedded in the image instead (for example, in Screenshots). That results in "pale," "less saturated" images.
Please check the color profile of your image you are trying to upload. As you see in the image below, the right image still has a monitor profile embedded instead of the RGB. You can avoid that by using the "Export as" function of the newest photoshop and choosing "Convert to sRBG."
With a correct RGB Profile, there are no issues.
