Might not be super subtle, but quite original in its form.
Source Alex Smith
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
Number 3 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Love me some light mesh on a Monday. Sharp.
Source Wilmotte Bastien
Seamless Prismatic Pythagorean Line Art Pattern No Background. A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
This light yellow background pattern consists of an irregular pattern of spots. Here's a light background pattern with yellowish tint.
Source V. Hartikainen
Dark, lines, noise, tactile. You get the drift.
Source Anatoli Nicolae
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
A dark brown fabric-like background texture with seamless pattern of winding stripes.
Source V. Hartikainen
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
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
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
From a drawing in 'La Principauté de Liège et les Pays-Bas au XVIe siècle', Société des Bibliophiles Liégeois ,1887.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
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
Textured Red Brown Plastic, Free Background Pattern. Although there's already enough plastic in our lives, let's bring it to the web too.)
Source V. Hartikainen
White handmade paper pattern with small bumps.
Source Marquis
Floral patterns might not be the hottest thing right now, but you never know when you need it!
Source Lauren
Nasty or not, it’s a nice pattern that tiles. Like they all do.
Source Badhon Ebrahim
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin