Here are some textures I scanned. They’re art paper and cardboard of various colors. Many are front and back of the same sheet. They’re all 300 dpi and somewhere around 8X10.
You may download these and use them however you like, for commercial or non-commercial use. If you want to put them on your website for a free download, that’s also fine, but I’d appreciate it if you’d credit me with a link in that case.
Here are close-up thumbnails of the textures. Click to open.