Based on an image that was uploaded to Pixabay by devanath
Source Firkin
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
Prismatic Groovy Concentric Background 4
Source GDJ
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
Original minus the background
Source Firkin
This light background pattern has a texture of "frozen" surface with diagonal stripes. Here's an yet another addition to the collection of free website backgrounds.
Source V. Hartikainen
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
Tiny, tiny 3D cubes. Reminds me of the good old pattern from k10k.
Source Etienne Rallion
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
Tiny little fibers making a soft and sweet look.
Source Badhon Ebrahim