This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
Fix and cc0 to get the tile this is based on.
Source SliverKnight
The image depicts a Japanese Edo pattern called "kanoko or 鹿の子" meaning "fawn" which has a fur with small white spots.
Source Yamachem
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
A seamless light gray paper texture with horizontal double lines.
Source V. Hartikainen
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
Prismatic Polka Dots Mark II 2 No Background
Source GDJ
Prismatic Triangular Seamless Pattern III With Background
Source GDJ
Abstract Ellipses Background Grayscale
Source GDJ
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
A seamless background pattern of dark brown wood planks.
Source V. Hartikainen
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using 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
Abstract Tiled Background Extended 10
Source GDJ
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Prismatic Hexagonalism Pattern No Background
Source GDJ
This is a seamless pattern which is derived from a flower petal image.
Source Yamachem
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
This one is super crisp at 2X. Lined paper with some dust and scratches.
Source HQvectors