Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
A colourful background drawn originally in paint.net and vectorised in Vector Magic.
Source Firkin
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
A nice looking light gray background pattern with diagonal stripes.
Source V. Hartikainen
A simple example on using clones. You can generate a nice base for a pattern fill quickly with it.
Source Lazur URH
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
You know you love wood patterns, so here’s one more.
Source Richard Tabor
A dark brown fabric-like background texture with seamless pattern of winding stripes.
Source V. Hartikainen
The name is totally random, but hey, it sounds good.
Source Atle Mo
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
Used a cherry by doctormo to make this seamless pattern
Source Firkin
A textured blue background pattern with vertical stripes.
Source V. Hartikainen
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
Prepared mostly as a raster in Paint.net and vectorised.
Source Firkin
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
Here's an yet another seamless note paper texture for use as a background on websites.
Source V. Hartikainen