A comeback for you: the popular Escheresque, now in black.
Source Patten
Free tiled background with colorful stripes and white splatter.
Source V. Hartikainen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
Utilising a bird from s-light and some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Alternative colour scheme for the original floral pattern.
Source Firkin
Nasty or not, it’s a nice pattern that tiles. Like they all do.
Source Badhon Ebrahim
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
The first pattern on here using opacity. Try it on a site with a colored background, or even using mixed colors.
Source Nathan Spady
ZeroCC tileable stone texture, edited from pixabay, CC0
Source Sojan Janso
Prismatic Geometric Pattern Background 2
Source GDJ
If you want png files of thisu can download them here :
Source Viscious-Speed
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
Everyone needs some stardust. Sprinkle it on your next project.
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
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
This is the remix of "Background pattern 115" uploaded by "Firkin".Thanks.
Source Yamachem
This is a seamless pattern of a woody texture.The original image is here:https://pixabay.com/ja/users/ClassicallyPrinted-1302233/
Source Yamachem