Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
Derived from an image that was uploaded to Pixabay by TheDigitalArtist
Source Firkin
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
Zero CC asphalt, pavement, texture, photographed and made by me. CC0 WARNING I FOUND A SEAM ON THIS TEXTURE
Source Sojan Janso
Nasty or not, it’s a nice pattern that tiles. Like they all do.
Source Badhon Ebrahim
Remixed from a drawing in 'Analecta Eboracensia', Thomas Widdrington, 1897.
Source Firkin
Sweet and subtle white plaster with hints of noise and grunge.
Source Phil Maurer
Remixed from a drawing in 'Works. Popular edition', John Ruskin, 1886.
Source Firkin
The starting point for this was drawn on the web site steamcoded.org/PolyskelionMaker.svg
Source Firkin
A nice and simple white rotated tile pattern.
Source Another One
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
A seamless background pattern of dark brown wood planks.
Source V. Hartikainen
A repeating background of thick textured paper. Actually, it turned out to look like something between a paper and fabric.
Source V. Hartikainen
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
Prismatic Abstract Background Design No Black
Source GDJ
A repeating background with wood/straw like texture.
Source V. Hartikainen
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
Like the name suggests, this background image consists of a pattern of dark bricks. It may be an option for you, if you are looking for something that looks like a brick wall for use as a background on web pages. It's not a masterpiece, but looks pretty nice when is tiled.
Source V. Hartikainen