Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
Tiny, tiny 3D cubes. Reminds me of the good old pattern from k10k.
Source Etienne Rallion
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo
Can’t believe we don’t have this in the collection already! Slick woven pattern with crisp details.
Source Max Rudberg
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
A light background pattern with diagonal stripes. Here's a simple light striped background for you.
Source V. Hartikainen
A floral background formed from numerous clones of flower 117.
Source Firkin
A seamless background pattern of dark brown wood planks.
Source V. Hartikainen
This is a remix of "blue wave-seigaiha".I hope this subtle color version of Seigaiha would be suitable for background .
Source Yamachem
Colourful background achieved with gradient fills.
Source Firkin
A seamless pattern created from a square tile. To get the tile, select the pattern in Inkscape and use shift+alt+i.
Source Firkin
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
A pattern drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Clean and crisp lines all over the place. Wrap it up with this one.
Source Dax Kieran
Prismatic Curved Diamond Pattern No Background
Source GDJ
Prismatic Geometric Pattern Background No Black
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