Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
Background Wall, Art Abstract, Star Well & CC0 texture.
Source Ractapopulous
A free black metallic background pattern. Here's a new pattern I made that looks metallic.
Source V. Hartikainen
Prismatic Abstract Background Design
Source GDJ
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
A version without colours blended together to give a different look.
Source Firkin
Prismatic Polka Dots 3 No Background
Source GDJ
An alternative colour scheme for the original background.
Source Firkin
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media
You know you can’t get enough of these linen-fabric-y patterns.
Source James Basoo
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
A blue gray fabric-like texture for websites. An yet another fabric-like texture. It has subtle vertical and diagonal stripes to it.
Source V. Hartikainen
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
A seamless pattern with green and yellow diagonal lines on top of a white dotted background.
Source V. Hartikainen
Prismatic Curved Diamond Pattern 3 No Background
Source GDJ
The image depicts a seamless pattern of the design which includes a stylized lotus and a stylized crane.I referred to the original image in a book which is into public domain.
Source Yamachem
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
The base gradient edited so now more details are rendered.
Source Lazur URH
Looks as if it's spray painted on the wall. You can be sure that this pattern will seamlessly fill your backgrounds on web pages.
Source V. Hartikainen
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin