A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
Sweet and subtle white plaster with hints of noise and grunge.
Source Phil Maurer
A seamless pattern formed from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Might not be super subtle, but quite original in its form.
Source Alex Smith
Remixed from a drawing that was uploaded to Pixabay by DavidZydd
Source Firkin
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
More leather, and this time it’s bigger! You know, in case you need that.
Source Elemis
Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas
The image is a seamless pattern which is derived from a vine .Consequently, the vine got like dots via vectorization.The original vine is here:jp.pinterest.com/pin/500744052301410188/
Source Yamachem
Tiny, tiny 3D cubes. Reminds me of the good old pattern from k10k.
Source Etienne Rallion
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
CC0 and seamless wellington boot pattern.
Source SliverKnight
Background Wall, Art Abstract, white Well & CC0 texture.
Source Ractapopulous
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
A version without colours blended together to give a different look.
Source Firkin
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A green background pattern with warped vertical stripes and a grunge look.
Source V. Hartikainen
Prismatic Groovy Concentric Background 2
Source GDJ
Coming in at 666x666px, this is an evil big pattern, but nice and soft at the same time.
Source Atle Mo
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin