Color differences jpeg and png

[DearDeparted]

Hi Rich,

I checked and the differences are very very small. But perhaps the question is why do different image viewer show the same image in a different way, while all being sRGB images? I'm not sure.

So both png and jpeg exported from the same psd file. In Gwen the png looks okay, but the jpeg is dull. In Geeqie they both look okay. In XViewer the jpeg again is dull. And uploading both to a website makes the png look okay but the jpeg dull.