Remixed from a vector adapted from a jpg on Pixabay. The tile this is constructed from can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Little x’es, noise and all the stuff you like. Dark like a Monday, with a hint of blue.
Source Tom McArdle
Derived from a drawing in 'Elfrica. An historical romance of the twelfth century', Charlotte Boger, 1885
Source Firkin
Background formed from the original with an emboss effect.
Source Firkin
Number 5 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
The image is a design of blue glass.How about using it as background image?
Source Yamachem
Bright Multicolored Floral Background by Karen Arnold from PDP.
Source GDJ
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
From a drawing in 'Picturesque New Guinea', J Lindt, 1887.
Source Firkin
This is sort of fresh, but still feels a bit old school.
Source Martuchox
You may use it as is, or modify it as you like.
Source V. Hartikainen
Classic 45-degree pattern, light version.
Source Luke McDonald
Background formed from the original with an emboss effect
Source GDJ
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Here's an yet another background for websites, with a seamless texture of wood planks this time.
Source V. Hartikainen
Adapted from an image that was uploaded to Pixabay by Anerma.
Source Firkin
Sharp but soft triangles in light shades of gray.
Source Pixeden
If you’re sick of the fancy 3D, grunge and noisy patterns, take a look at this flat 2D brick wall.
Source Listvetra
Might not be super subtle, but quite original in its form.
Source Alex Smith
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I. Version with black background.
Source Firkin
Continuing the geometric trend, here is one more.
Source Mike Warner
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
This could be a hippy vintage wallpaper.
Source Tileable Patterns