The name is totally random, but hey, it sounds good.
Source Atle Mo
Kaleidoscope Prismatic Abstract No Background
Source GDJ
This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda
This is sort of fresh, but still feels a bit old school.
Source Martuchox
Prismatic Polka Dots 3 No Background
Source GDJ
This one is amazing, truly original. Go use it!
Source Viahorizon
A free seamless background texture of "timber wall" (colored in dark brown).
Source V. Hartikainen
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
Zero CC tileable cork floor, photographed and made by me. CC0
Source Sojan Janso
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
The image is a seamless pattern of a fishnet.
Source Yamachem
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
Prismatic Geometric Pattern Background
Source GDJ
A dark background pattern/texture of a dimpled metal plate.
Source V. Hartikainen
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin