A seamless background texture of old cardboard.
Source V. Hartikainen
Prismatic Abstract Geometric Background 4
Source GDJ
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
I love these crisp, tiny, super subtle patterns.
Source Badhon Ebrahim
Zero CC tileable Laminate wood texture, photographed and made by me. CC0
Source Sojan Janso
Remixed from a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Sweet and subtle white plaster with hints of noise and grunge.
Source Phil Maurer
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
This background image has seamless texture that resembles a surface of gray stone.
Source V. Hartikainen
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
A dark metallic background with a pattern of stamped dots. Here's a dark "metallic" background pattern for you.
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Sometimes you just need the simplest thing.
Source Fabricio
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo