Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat
Prismatic Triangular Background Design Mark II 5
Source GDJ
Inspired by an image that was uploaded to Pixabay by geralt
Source Firkin
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
Remixed from a drawing that was uploaded to Pixabay by captenpub.
Source Firkin
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
Inspired by a pattern seen on a public domain image of a very old tile. To get the unit cell, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
Seamless SVG vector and JPG backgrounds with faded diagonal stripes. The colors are editable.
Source V. Hartikainen
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
Prismatic Groovy Concentric Background
Source GDJ
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Continuing the geometric trend, here is one more.
Source Mike Warner
More Japanese-inspired patterns, Gold Scales this time.
Source Josh Green
I’m starting to think I have a concrete wall fetish.
Source Atle Mo
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Hey, you never know when you’ll need a bird pattern, right?
Source Pete Fecteau
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin