Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
A free background pattern with abstract green tiles.
Source V. Hartikainen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Sort of reminds me of those old house wallpapers.
Source Tish
Everyone needs some stardust. Sprinkle it on your next project.
Source Atle Mo
A frame using leaves from an image that was uploaded to Pixabay by mayapujiati
Source Firkin
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
Light gray pattern with an almost wall tile-like appearance.
Source Markus Tinner
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
This was formed by distorting an image of a background on Pixabay.
Source Firkin
The image depicts a seamless pattern of the design which includes a stylized lotus and a stylized crane.I referred to the original image in a book which is into public domain.
Source Yamachem
Remixed from a JPG that was uploaded to Pixabay by theasad121
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
You know you love wood patterns, so here’s one more.
Source Richard Tabor
A free seamless background with pink spots.
Source V. Hartikainen
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin