myinon wrote...
Can you see if you can get the coloring issues for these 3 releases fixed?
You have unfortunately come across a very problematic matter with all three of these: low-contrast gradients. These are something where it's not uncommon to see issues present at source level already,
and you also have to deal with the fact that JPG compression has a hard time dealing with them (it just won't look as good as a lossless PNG would, even if you were to turn the quality all the way to 100, the maximum).
Looking into the illustrations in question, there are indeed banding issues present at source level already. Would it technically be possible to deal with that? Yes, but unfortunately, our production pipeline is not built in a manner that would accommodate appropriate filtering measures to deal with this in a high quality manner, and adding that capacity into it would be no simple task. And even then, no matter how flawless your sources are, you would still be dealing with the issue of JPG compression, as PNG is just not a feasible option for online reading when it comes to full color images (the files would simply be
way too big compared to everything else). The only real solution in this regard would be to use a newer image format for color images, like JPEG XL, AVIF or even HEIC, but all of these have issues ranging from browser support, stable format definitions, encoding speeds, decoding speeds, to even possible patent licensing issues in case of HEIC... not to mention that our current comic reading infrastructure also just isn't built in a way that would accommodate multiple formats for a page nor does it have feature detection capabilities for deducing what image formats a user's browser would support.
In the long run, I would certainly like to address both of the things I brought up - introducing high quality image processing options and tooling into our production pipeline, as well offering higher quality images with newer formats like JPEG XL or AVIF, but as said, these are very much things that can
only be realistically addressed in the long run - and in the meantime, I'm afraid we'll just have to put up with a little banding here and there when it comes to low-contrast gradients in color images.