Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo
White handmade paper pattern with small bumps.
Source Marquis
Prismatic Geometric Pattern Background 2
Source GDJ
Here's a camo print with more tan and less green, such as might be used in a desert scenario. This is tileable, so it can be used as a wallpaper or background.
Source Eady
This ladies and gentlemen, is texturetastic! Love it.
Source Adam Pickering
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Based on several public domain drawings on Wikimedia Commons. This was formed from a rectangular tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
Zero CC tileable moss or lichen covered stone texture, edited from pixabay. CC0
Source Sojan Janso
Dark, lines, noise, tactile. You get the drift.
Source Anatoli Nicolae
Number 5 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
Seamless pattern made from a tile that can be obtained in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a drawing in 'Two Women in the Klondike', Mary Hitchcock, 1899.
Source Firkin
From a drawing in 'Bond Slaves. The story of a struggle.', Isabella Varley, 1893.
Source Firkin
Very simple, very blu(e). Subtle and nice.
Source Seb Jachec
If you don’t like cream and pixels, you’re in the wrong place.
Source Mizanur Rahman
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova