Prismatic Triangular Background Design Mark II 5
Source GDJ
This could be a hippy vintage wallpaper.
Source Tileable Patterns
A cute x, if you need that sort of thing.
Source Juan Scrocchi
Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ
The starting point for this was a texture drawn with the 'Radial Colors' plug-in in Paint.net.
Source Firkin
Some dark 45 degree angles creating a nice pattern. Huge.
Source Dark Sharp Edges
A very dark asfalt pattern based off of a photo taken with my iPhone.
Source Atle Mo
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
The classic notebook paper with horizontal stripes.
Source Are Sundnes
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Seamless Olive Green Web Background Image
Source V. Hartikainen
A frame using leaves from an image that was uploaded to Pixabay by mayapujiati
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
From a drawing in 'Hubert Montreuil, or the Huguenot and the Dragoon', Francisca Ouvry, 1873.
Source Firkin
A seamless pattern formed from miutopia's cakes on a tablecloth.
Source Firkin
Abstract Ellipses Background Grayscale
Source GDJ
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
One more sharp little tile for you. Subtle circles this time.
Source Blunia
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Subtle scratches on a light gray background.
Source Andrey Ovcharov
A bit strange this one, but nice at the same time.
Source Diogo Silva