Why is Preview causing the colors to blend in these pdflatex'ed PNG images?

by NeutronStar   Last Updated August 13, 2019 23:12 PM - source

I made the following image in PDF format (a figure for a scientific work):

grid of colors with colors distinct

On my Linux machine, I've opened this image in evince and okular and it looks like it appears here just fine. It also appears this way on Google Drive.

However, when I open it with Preview on my Macbook, it looks like this:grid of colors with colors blended

Why are the colors blending in Preview, and is there a way to keep this from happening? (I will need to send this figure as part of a work for a printer to print off and I would like to guarantee that the figure stays "whole" for the printing.)

Tags : pdf preview color

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