If you can't find the perfect "Green Nebula" in that exact size, you can use or Adobe Express . Set a "Custom Size" of 2560x1700 , upload a high-res space photo, and apply a green color tint or filter to get the exact look you want.

Use the dropdown to select so there are no black bars. On ChromeOS : Right-click the desktop and select Set wallpaper & style .

: Provides curated collections of green nebula backgrounds. While many are 4K or 1080p, you can often find 2560-width options.

Finding and setting a space-themed wallpaper—common for devices like the Chromebook Pixel —requires searching for specific high-resolution assets to ensure the image isn't blurry or stretched. 1. Top Sources for Space Wallpapers

: Offers a wide variety of deep space imagery, including digital art of green nebulae and "Mysterious Planets" at the exact 2560x1700 resolution.