I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
From a drawing in 'Heroes of North African Discovery', Nancy Meugens, 1894.
Source Firkin
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
A seamless web texture of "green stone".
Source V. Hartikainen
This is a remix of "geometrical pattern 01".
Source Yamachem
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
Prismatic Triangular Background Design Mark II 5
Source GDJ
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Inspired by a drawing in 'Poems', James Smith, 1881.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Remixed from a drawing in 'A Child of the Age', Francis Adams, 1894.
Source Firkin
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo
Farmer could be some sort of fabric pattern, with a hint of green.
Source Fabian Schultz
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Prismatic Polyskelion Pattern No Background
Source GDJ
A new take on the black linen pattern. Softer this time.
Source Atle Mo
Zero CC tileable yellow craft paper; scanned and made by me. CC0
Source Sojan Janso
A gray background pattern with a texture of textile. Suits perfectly for web design.
Source V. Hartikainen
Black brick wall pattern. Brick your site up!
Source Alex Parker
Remixed from a design on Pixabay. To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin