Derived from an image that was uploaded to Pixabay by starchim01
Source Firkin
Oh yes, it happened! A pattern in full color.
Source Atle Mo
Formed by heavily distorting part of a an image of a fish uploaded to Pixabay by GLady
Source Firkin
An abstract Background pattern of purple twisty patterns.
Source TikiGiki
A free black metallic background pattern. Here's a new pattern I made that looks metallic.
Source V. Hartikainen
As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
U.S.-based National Fire Protection Association standard fire diamond for flagging risks posed by hazardous materials. The red diamond has a number 0-4 depending on flammability. The blue diamond has a number 0-4 depending on health hazard. The yellow has a number 0-4 depending on reactivity. the white square has a special notice, e.g OX for oxidizer.
Source Firkin
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
A floral background formed from numerous clones of flower 117.
Source Firkin
This background image has seamless texture that resembles a surface of gray stone.
Source V. Hartikainen
A background tile for web with abstract repeating texture of dark "stone wall".
Source V. Hartikainen
Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin
Square design drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
Can never have too many knitting patterns, especially as nice as this.
Source Victoria Spahn
Prismatic Rounded Squares Grid 4 No Background
Source GDJ