If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
If you want png files of thisu can download them here :
Source Viscious-Speed
Psychedelic Geometric Background No Black
Source GDJ
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Can never have too many knitting patterns, especially as nice as this.
Source Victoria Spahn
Prismatic Geometric Pattern Background
Source GDJ
Prismatic Groovy Concentric Background 3
Source GDJ
This seamless light brown background texture resembles a wallpaper with vertical stripes. One way to use it is as a tiled background on web sites.
Source V. Hartikainen
Prismatic Abstract Geometric Background 2 No Black
Source GDJ
Luxurious looking pattern (for a T-shirt maybe?) with a hint of green.
Source Simon Meek
Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
Embossed lines and squares with subtle highlights.
Source Alex Parker
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Here's a dark background pattern that contains a steel grid pattern as a texture. Use it as a website background or for other purposes. It's free!
Source V. Hartikainen
The image depicts a seamless pattern which includes hexagonally-aligned gourds with BG in light-brown.
Source Yamachem
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
Snap! It’s a pattern, and it’s not grayscale! Of course you can always change the color in Photoshop.
Source Atle Mo
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
Vector version of a JPG that was uploaded to Pixabay by theasad121
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova