This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
Your eyes can trip a bit from looking at this – use it wisely.
Source Michal Chovanec
Abstract Tiled Background Extended 12
Source GDJ
A seamless pattern of leopard skin. It should look nice as a background element on web pages.
Source V. Hartikainen
A lovely light gray pattern with stripes and a dash of noise.
Source V. Hartikainen
You know you can’t get enough of these linen-fabric-y patterns.
Source James Basoo
Fix side and a seamless pattern formed from circles.
Source SliverKnight
Remixed from a drawing in 'Canadian forest industries July-December', 1915
Source Firkin
Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
CC0 remixed from a drawing. Walter Crane, 1914, Firkin.
Source SliverKnight
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
From a drawing in 'Navigations de Alouys de Cademoste.-La Navigation du Capitaine Pierre Sintre', Alvise da ca da Mosto, 1895.
Source Firkin
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo
Has nothing to do with toast, but it’s nice and subtle.
Source Pippin Lee
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso