The original artwork. Created as a high resolution image of 300 dpi (dots per inch) which is required for sharp, clear printing on a 6"x9" book cover:

Printed version. Publisher added text (I prefer to do that myself when possible). The printer introduced a color shift to green, making things muddy and changing the color of the ocean! I was not shown a proof, so I couldn't fix it and the book went out this way: