Might not be super subtle, but quite original in its form.
Source Alex Smith
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A seamless pattern formed from background pattern 102
Source Firkin
As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova
This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler
Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
This is the remix of "polka dot seamless pattern".The image depicts polka dot seamless pattern.
Source Yamachem
Prismatic Abstract Geometric Background 2
Source GDJ
This one looks like a cork panel. Feel free to use it as a tiled background on your blog or website.
Source V. Hartikainen
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
New paper pattern with a slightly organic feel to it, using some thin threads.
Source Atle Mo
A fun-looking elastoplast/band-aid pattern. A hint of orange tone in this one.
Source Josh Green
CC0 remixed from a drawing. Walter Crane, 1914, Firkin.
Source SliverKnight
Prismatic Groovy Concentric Background 2
Source GDJ
The image a seamless pattern derived from a weed which I can't identify.The original weed image is from here:https://jp.pinterest.com/pin/500744052301423641/
Source Yamachem
Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
A background pattern with green vertical stripes. A new striped background pattern. This time a green one.
Source V. Hartikainen