Might not be super subtle, but quite original in its form.
Source Alex Smith
Prismatic Rounded Squares Grid 3 No Background
Source GDJ
The name is totally random, but hey, it sounds good.
Source Atle Mo
Sort of reminds me of those old house wallpapers.
Source Tish
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
Here's a subtle marble-like background for use on websites.
Source V. Hartikainen
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
Stefan is hard at work, this time with a funky pattern of squares.
Source Stefan Aleksić
Inspired by a 1930s wallpaper pattern I saw on TV.
Source Firkin
A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
A good starting point for a cardboard pattern. This would work well in a variety of colors.
Source Atle Mo
Prismatic Polyskelion Pattern No Background
Source GDJ
An aged paper background tile with smeared and pressed text.
Source V. Hartikainen
From an image on opengameart.org shared by rubberduck.
Source Firkin
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
Prismatic Curved Diamond Pattern 3 No Background
Source GDJ
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Another fairly simple design drawn in Paint.net and vectorized in Inkscape.
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
The name is totally random, but hey, it sounds good.
Source Atle Mo
emixed from a JPG that was uploaded to Pixabay by Kyotime
Source Firkin