A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
A version without colours blended together to give a different look.
Source Firkin
From a drawing in 'Less Black than we're painted', James Payn, 1884.
Source Firkin
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
This yellow background consists of a pattern of glossy gold buttons arranged in polka dot style on a seamless texture. Here's a pale yellow background pattern. Feel free to use it for your needs!
Source V. Hartikainen
A nice and simple white rotated tile pattern.
Source Another One
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
By popular request, an outline version of the pentagon pattern.
Source Atle Mo
As the original image 's page size is too large for its image size, I remixed it.
Source Yamachem
Prismatic Groovy Concentric Background 2
Source GDJ
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
A bit of scratched up grayness. Always good.
Source Dmitry
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin