A black tile-able background with paper-like texture.
Source V. Hartikainen
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Prismatic Geometric Pattern Background 2 No Black
Source GDJ
A black tile-able background with paper-like texture.
Source V. Hartikainen
Retro Circles Background 4 No Black
Source GDJ
Remixed from a PNG that was uploaded to Pixabay by k_jprather
Source Firkin
Not strictly seamless in that opposite edges are not identical. But they do marry up to make an interesting pattern
Source Firkin
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
You know, tiny and sharp. I’m sure you’ll find a use for it.
Source Atle Mo
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
A seamless pattern formed from background pattern 102
Source Firkin