I have collected a large number of textured color background images that I use with several different skins for backgrounds on the thumbnail and expanded image pages. It was suggested to me that others might like to have access to those images for use in their own albums. The 893 images are collected in 10 different folders that identify the general color type of the images in each. Since some skins may contain borders or boxes that the user would like to have "disappear" against the background, I have included a spreadsheet that shows a "good" average color match of 187 of those background images.
The images within a folder can be viewed as thumbnails and saved individually by clicking on the thumbnail and then right clicking the image, or the entire folder can be downloaded as a zipped file. If you have any questions, please post them here.
Very generous of you to share these. Are they your own images or collected from various sources? I ask so that any users will know that they can be used free of any copyright restriction or need to reference the original source.
Perhaps half of the images are ones I have downloaded from several different websites I have run across over a period of several years. In every case they were made available for download without restriction and without a request for attribution. In fact, when I would run across a site and download some images I would often find that many of the "new" images were ones I had already downloaded from other sites, with the second site even using the same title. So, If I did want to acknowledge the source (which I would be glad to do), I wouldn't know which, if any, of the sites I had used were actually the originators of the image.
Most of the other images are ones that I have created by modifying an image - downsizing it (sometimes in more than one step) to change the intensity of the texturing, and/or changing brightness, contrast, or color balance. An image of 200 X 200 px tiled across a page will have a very different appearance from that image downsized to 50 X 50 or 20 X 20 tiled across a page. That's why you see so many 20 X 20 images in the collection. I hope you and others find them useful.
I don't think I'd worry too much about copyright issues when it comes to things like background textures. It's not quite the same thing as using a photo that a professional photographer has taken, and is trying to use to make a living. The only "background" images normally sold by sites aren't just simple textures - they're more like abstract artwork.
And there are literally thousands of freebies out there. Just one example: http://www.grsites.com/archive/textures/. Between the background images and the free fonts on that site, you could lose yourself for days.
Still, your referenced site might be a good place for a user to start looking for backgrounds. One thing I found out the hard way is that googling for "background images" and going down the line clicking on the results is a very dangerous game and can lead you to some very nasty places.