Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
The tile can be had by using shift+alt+i on the selected rectangle in Inkscape
Source Firkin
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
Prismatic Abstract Line Art Pattern Background
Source GDJ
A seamless pattern formed from a tile made from ornament 22. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
Light honeycomb pattern made up of the classic hexagon shape.
Source Federica Pelzel
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
Prismatic Triangular Seamless Pattern III With Background
Source GDJ
Remixed from a drawing in 'The March of Loyalty', Letitia MacClintock, 1884.
Source Firkin
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat
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
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
I asked Gjermund if he could make a pattern for us – result!
Source Gjermund Gustavsen
A background formed from an image of an old tile on the New York Metropolitan Museum of Art website. To get the base tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
As the original image 's page size is too large for its image size, I remixed it.
Source Yamachem
A black tile-able background with paper-like texture.
Source V. Hartikainen
A textured orange background pattern with vertical stripes.
Source V. Hartikainen
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8