I just made my first dog art with a transparent background, that means you can customize the background to whatever color you choose. By default I gave this Beagle poster an orange background, but changing it is as simple as clicking the "Customize It " button on the product page and choosing a color from the color palette. If you want more color options just click the color picker on the palette.
I plan on making more dog art with customizable background colors, in the meantime the Beagle art pictured here is also available on pillows with customizable background color too!