Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Based on an image that was uploaded to Pixabay by devanath
Source Firkin
Sometimes you just need the simplest thing.
Source Fabricio
Prismatic Groovy Concentric Background 3
Source GDJ
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Has nothing to do with toast, but it’s nice and subtle.
Source Pippin Lee
From a drawing in 'A Life Interest', Mrs Alexander, 1888.
Source Firkin
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
Love me some light mesh on a Monday. Sharp.
Source Wilmotte Bastien
With a name like this, it has to be hot. Diagonal lines in light shades.
Source Isaac
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
This one resembles a black concrete wall when is tiled. It should look great, at least with dark website themes.
Source V. Hartikainen
Remixed from a JPG that was uploaded to Pixabay by Osckar
Source Firkin
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
ZeroCC tileable moss texture, photographed and made by me. CC0
Source Sojan Janso
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
An interesting dark spotted pattern at an angle.
Source Hendrik Lammers
More bright luxury. This is a bit larger than fancy deboss, and with a bit more noise.
Source Viszt Péter
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
Seamless Prismatic Quadrilateral Line Art Pattern No Background
Source GDJ
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Prismatic Abstract Geometric Background 5
Source GDJ
This white background pattern has a seamless grunge style texture. Here's a white grunge style background pattern. Use it as a tiled background image on web sites or for other purposes.
Source V. Hartikainen