Your browser may have a bad ICC profile. See http://www.color.org/version4html.xalter and http://www.libpng.org/pub/png/png-colortest.html

I'm almost positive that the linked PNG has no attached color profile. There are many browser color correction problems; this is an image authoring problem.

I was really surprised that both of my browsers have bad color correction. What's nice is the pdf confirms this: this are wrong in the browser, but right in the external pdf.

Thank you!

I never knew about this. Thanks.

Looks red to me. /s

https://en.wikipedia.org/wiki/Gaslighting

I see no red in your screenshot, but the image on nautilus appears red, they may have fixed the error (either that or your browser is very weird and renders red to blue)

Here's a direct link to what I see. http://static.nautil.us/6380_2f635a9fe4a4d8d1ec9e3a111cc02f4...

Maybe they updated the image afterward? If so, I like how they sent the correction to the art department and not to a copy editor to fix a few characters.

Edit: dalke explains elsewhere in this thread.

It appears they changed it to red since you took this image.

Should probably be blue not red

Red is the conventional color for how to depict oxygen. Blue is the conventional color for nitrogen.

The convention is called "CPK coloring" after Robert Corey, Linus Pauling, and Walter Koltun. See http://en.wikipedia.org/wiki/CPK_coloring .

That is lovely but doesn't explain why the mismatch exists between the picture being blue and caption for the picture saying red.

"BIG ICE: Liquid water (left) is composed of hydrogen (white) and oxygen (red) atoms arranged in a nearly tetrahedral structure. Common ice, or Ice Ih (right), shows a three-dimensional network that is less dense, explaining why ice floats on water."

Your are right and it is being corrected.

Phew... I thought this was another case of that conflict like that "what color is this dress?" bruhaha a couple of months ago.

No red for me.

firefox mobile has no red either.

What do you see instead of red?

Black and gold.