From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
Number five from the same submitter, makes my job easy.
Source Dima Shiper
This one is so simple, yet so good. And you know it. Has to be in the collection.
Source Gluszczenko
Inspired by a design found in 'Konstantinápolyi emlékeim', Miklos Chriszto, 1893.
Source Firkin
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Sharp pixel pattern, just like the good old days.
Source Paridhi
The image depicts a seamless pattern of a tortoise in tortoiseshell (hexagon).
Source Yamachem
A bit simplified version. Although it could be edited out to be simpler. Anyway, this time the tiling is converted to a pattern fill -which is using clipping for the tile's edges.
Source Lazur URH
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
Adapted from an image that was uploaded to Pixabay by Anerma.
Source Firkin
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
The image a seamless pattern of a wire-mesh fence.I want you to use this pattern as a lower layer.
Source Yamachem
I love cream! 50x50px and lovely in all the good ways.
Source Thomas Myrman
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
Traced from a drawing in 'Household Stories from the Collection of the Brothers Grimm', Wilhelm Carl Grimm , 1882.
Source Firkin
Classic vertical lines, in all its subtlety.
Source Cody L
Use shift+alt+i on the selected rectangle in Inkscape to get the tile this is based on
Source Firkin