The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
A lovely light gray pattern with stripes and a dash of noise.
Source V. Hartikainen
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
Zero CC bark from fur tree tileable texture, photographed and made by me. CC0
Source Sojan Janso
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
This is the remix of "polka dot seamless pattern".The image depicts polka dot seamless pattern.
Source Yamachem
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
Here's an yet another background for websites, with a seamless texture of wood planks this time.
Source V. Hartikainen
A comeback for you: the popular Escheresque, now in black.
Source Patten
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
The image is a remix of "edo pattern-samekomon".I changed the color of dots from black to white and added BG in light-yellow.
Source Yamachem
Your eyes can trip a bit from looking at this – use it wisely.
Source Michal Chovanec
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin