The image is a seamless pattern of a fishnet.
Source Yamachem
Thin lines, noise and texture creates this crisp dark denim pattern.
Source Marco Slooten
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
Just the symbols of the signs of the zodiac distributed in a chequer board-like pattern
Source Firkin
Feel free to download and use it, or see the rest of the dark background patterns that I have made. Anyway, I hope you will find something that you like.
Source V. Hartikainen
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
Heavily remixed from a drawing in 'Barbara Leybourne; a story of eighty years ago', Sarah Hamer, 1889.
Source Firkin
This is a hot one. Small, sharp and unique.
Source GraphicsWall
Your eyes can trip a bit from looking at this – use it wisely.
Source Michal Chovanec
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
The first pattern on here using opacity. Try it on a site with a colored background, or even using mixed colors.
Source Nathan Spady
This is a remix of "blue wave-seigaiha".I hope this subtle color version of Seigaiha would be suitable for background .
Source Yamachem
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
The tile this is based on was adapted from an image that was uploaded to Pixabay by frolicsomepl. It can be had in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Prismatic Snowflakes Pattern No Background
Source GDJ
From a drawing in 'Hubert Montreuil, or the Huguenot and the Dragoon', Francisca Ouvry, 1873.
Source Firkin
A seamless pattern drawn originally in Paint.net by distorting a slice of background pattern 116 and copying the resulting triangle numerous times.
Source Firkin
I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
Spice up your next school project with this icon background.
Source Swetha