It's the Cold Pressed Watercolor Paper texture created in the Filter Forge plugin. It can be seamless tiled and rendered in any resolution without loosing details. You can see the presets and download this texture for free on the Filter Forge site here — www.filterforge.com/filters/11073.html (created by Heliagon)
Add a classic, woven touch to any wall in your home with our Linen Texture Peel and Stick Wallpaper. Cement illustrations of a fabric texture are laid on top of a white background. Choose from different combinations of colors to match your interior style perfectly!