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How do you know it's just artifact?

I don't know how the effect of a red can has been created but I can imagine it has to do with the use of all these subtle color variation, the vertical bars...

Zooming in and just looking at it with the naked eye, I can see the slight color variations, especially in the white bars. Slowly zooming out, the white turns to pink and finally to red. Look at part...

I opened the image in XDP, zoomed in and saw variations of hints of red (and other colors) in the white vertical bars. With the eyedropper, I also checked the black bars and they also have hints of...

I think there's a bit of red (actually, shades of red) in there that shows clearer the more you zoom out.