I would say that depends on your browser, faktablad, most good [keyword good] display PNGs fine. it could just be the c64 pallete that I chose, which I believe is the one the emulator VICE uses [I stole it from some c64 sprite editor]
I agree with InvaderLupus, but I think it's because you made it look stretched even when it probably shouldn't. Regardless of the widepixels, it should probably look just as normal.
Your use of the palette is interesting. I think saving it as a PNG corrupted the colors a bit though.
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