Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
Classic vertical lines, in all its subtlety.
Source Cody L
A repeating background of beige paper with vintage look. Repeats to infinity, as usual.
Source V. Hartikainen
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Non-seamless pattern drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
Prismatic Hypnotic Pattern 2 No Background
Source GDJ
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
A seamless pattern from a tile made from a jpg on Pixabay. To get the tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
A seamless dark leather-like background texture with diagonal lines that look like stitches.
Source V. Hartikainen
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin