Earth's oceans may have been green for billions of years until the first photosynthetic organisms flooded our atmosphere with oxygen.

Now, the interesting thing about methylene blue is that, if ingested, it can temporarily change a person's urine colour. The effects range from a faint green tint to a bright blue stream. "For the ...

Blue Palm is a jade green that helps bring topical motifs into fall. Oxblood, a burnt, orange-tinted red, provides an update to classic holiday red. Twilight, a plum purple, evokes a sense of ...