Abstract Ellipses Background Grayscale
Source GDJ
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
Prismatic Groovy Concentric Background 2
Source GDJ
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
Smooth Polaroid pattern with a light blue tint.
Source Daniel Beaton
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
Three shades of gray makes this pattern look like a small carbon fiber surface. Great readability even for small fonts.
Source Atle Mo
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
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
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Zero CC tileable bark texture, photographed and made by me. CC0
Source Sojan Janso
Might not be super subtle, but quite original in its form.
Source Alex Smith
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
Clean and crisp lines all over the place. Wrap it up with this one.
Source Dax Kieran
Imagine you zoomed in 1000X on some fabric. But then it turned out to be a skeleton!
Source Angelica
Background formed from the original with an emboss effect.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Paper pattern with small dust particles and 45-degree strokes.
Source Atle Mo
Tiny little flowers growing on your screen. Nice, huh?
Source Themes Tube