A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
The following repeating website background is colored in a blue gray color and resembles a concrete wall or something similar to it.
Source V. Hartikainen
From a drawing in 'Cassell's Library of English Literature', Henry Morley, 1883.
Source Firkin
The image is a remix of "edo pattern-samekomon".I changed the color of dots from black to white and added BG in light-yellow.
Source Yamachem
From a drawing in 'A Life Interest', Mrs Alexander, 1888.
Source Firkin
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard
As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
A free background pattern with abstract green tiles.
Source V. Hartikainen
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Prismatic Abstract Geometric Background 4
Source GDJ
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin
The image depicts a seamless pattern of Japanese Edo pattern called "kikkou-matsu" or "亀甲松" meaning " tortoiseshell-pinetree".The real pinetree is like this: https://jp.pinterest.com/pin/500744052301065077/
Source Yamachem
This background pattern contains a seamless texture of bark. It's not very realistic, but I think it looks quite nice.
Source V. Hartikainen
An alternative colour scheme to the original seamless pattern.
Source Firkin
The name is totally random, but hey, it sounds good.
Source Atle Mo
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin