I'm working with a color logo created in Illustrator. When it's exported as a PNG at a large size, it looks fine. If I export it at a smaller size, it creates a faint black line between the colors.

black pixels added shown at 1200%

I've also opened it in Sketch to see if it was a program problem, but it's happening there too.

Any help is appreciated. Thanks!

  • This is due to anti-aliasing. Red line in this instance has semi-transparent pixels running up the sides, when it overlays on the blue it creates a darker purple color.
    – Hanna
    Commented Jun 15, 2015 at 20:54

1 Answer 1


I wouldn't be concerned about this. You seem to be zoomed in quite far too. Also I'm pretty sure this is an artifact of raster anti-aliasing. If the "black line" or blend wasn't there, you would have a very jagged edge between colors.

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