From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
This one resembles a black concrete wall when is tiled. It should look great, at least with dark website themes.
Source V. Hartikainen
Prismatic Groovy Concentric Background 4
Source GDJ
Subtle scratches on a light gray background.
Source Andrey Ovcharov
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
Prismatic Curved Diamond Pattern 7 No Background
Source GDJ
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
From a design in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A dark metallic background with a pattern of stamped dots. Here's a dark "metallic" background pattern for you.
Source V. Hartikainen
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
The classic notebook paper with horizontal stripes.
Source Are Sundnes
The image depicts a seamless pattern of a tortoise in tortoiseshell (hexagon).
Source Yamachem
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Imagine you zoomed in 1000X on some fabric. But then it turned out to be a skeleton!
Source Angelica
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
A very dark spotted twinkle pattern for your twinkle needs.
Source Badhon Ebrahim
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
Prismatic Triangular Background Design Mark II 5
Source GDJ
Adapted from an image that was uploaded to Pixabay by Anerma.
Source Firkin
It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
From a drawing in 'Friend or Fortune? The story of a strange year', Robert Overton, 1897.
Source Firkin
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo