The image is a remix of "edo pattern-samekomon".I changed the color of dots from black to white and added BG in light-brown.
Source Yamachem
From a drawing in 'Cassell's Library of English Literature', Henry Morley, 1883.
Source Firkin
This is a remix of "geometrical pattern 01".
Source Yamachem
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
Derived from an image that was uploaded to Pixabay by starchim01
Source Firkin
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
Prismatic Geometric Pattern Background
Source GDJ
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
With a name this awesome, how can I go wrong?
Source Nikolay Boltachev
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
Seamless Prismatic Geometric Pattern With Background
Source GDJ
Prismatic Groovy Concentric Background 4
Source GDJ
From a drawing in 'The Quiver of Love', Walter Crane, 1876
Source Firkin
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A good starting point for a cardboard pattern. This would work well in a variety of colors.
Source Atle Mo