A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
Remixed from a drawing that was uploaded to Pixabay by captenpub.
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
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
From drawing in 'Musings in Maoriland', Thomas Bracken, 1890.
Source Firkin
Fake or not, it’s quite luxurious.
Source Factorio.us Collective
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
Greyscale version of a pattern that came out of playing with the 'slinky' plug-in for Paint.net
Source Firkin
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
Prismatic Chevrons Pattern 5 With Background
Source GDJ
Prismatic Abstract Geometric Background 2 No Black
Source GDJ
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
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
Greyscale version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
A light gray wall or floor (you decide) of concrete.
Source Atle Mo