This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Spice up your next school project with this icon background.
Source Swetha
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
It’s like Shine Dotted’s sister, only rotated 45 degrees.
Source mediumidee
This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
Sometimes you just need the simplest thing.
Source Fabricio
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
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
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Prismatic Floral Pattern 3 Variation 3 No Background
Source GDJ
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
A free seamless background pattern for use on websites.
Source V. Hartikainen