Images not showing true color

Hello, Thanks for a great theme. Some of my images are showing up with a grey tone rather than their true color. Here is an example: https://www.fantaseajewelry.com/shop/labradorite-pendant-oval-pear-london-blue-topaz/ However, when I click the images to enlarge them, they are shown in the correct hue. This is not happening with all my product but with several of them. Is this something that is a theme issue or could it be from my shopping cart (WooCommerce)? Thank you!