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