Dark, lines, noise, tactile. You get the drift.
Source Anatoli Nicolae
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
Adapted from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Prismatic Geometric Pattern Background
Source GDJ
Classic vertical lines, in all its subtlety.
Source Cody L
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
8 by 8 pixels, and just what the title says.
Source pixilated
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
An alternative colour scheme for the original background.
Source Firkin
A white version of the very popular linen pattern.
Source Ant Ekşiler
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
From a drawing in 'Handbook of the excursions proposed to be made by the Lincoln Diocesan Architectural Society, on the 27th and 28th of May, 1857', Edward Trollope, 1857.
Source Firkin
Light and tiny, just the way you like it.
Source Rohit Arun Rao
Sometimes you just need the simplest thing.
Source Fabricio
A seamless background texture of old cardboard.
Source V. Hartikainen
Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
This seamless light brown background texture resembles a wallpaper with vertical stripes. One way to use it is as a tiled background on web sites.
Source V. Hartikainen
Prismatic Hypnotic Pattern 2 No Background
Source GDJ
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin