Derived from a JPG that was uploaded to Pixabay by ractapopulous
Source Firkin
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
This is a grid, only it’s noisy. You know. Reminds you of those printed grids you draw on.
Source Vectorpile
More leather, and this time it’s bigger! You know, in case you need that.
Source Elemis
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
A good starting point for a cardboard pattern. This would work well in a variety of colors.
Source Atle Mo
The original enhanced with one of Inkscapes's filters.
Source Firkin
A colourful background drawn originally in paint.net and vectorised in Vector Magic.
Source Firkin
From a drawing in 'A Life Interest', Mrs Alexander, 1888.
Source Firkin
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
A new take on the black linen pattern. Softer this time.
Source Atle Mo
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
You were craving more leather, so I whipped this up by scanning a leather jacket.
Source Atle Mo