A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
Background formed from the original with an emboss effect
Source GDJ
Has nothing to do with toast, but it’s nice and subtle.
Source Pippin Lee
Prismatic Floral Background No Black
Source GDJ
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a drawing in 'A Life Interest', Mrs Alexander, 1888.
Source Firkin
This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
Fake or not, it’s quite luxurious.
Source Factorio.us Collective
Here I have tried to create something that would look like maple wood. Not sure how well it's turned out, but at least it looks like wood.
Source V. Hartikainen
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
You know I love paper patterns. Here is one from Stephen. Say thank you!
Source Stephen Gilbert
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
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
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
An attempt for cleaning up the original image in a few steps.
Source Lazur URH