This seamless pattern consists of a blue grid on a yellow background.
Source V. Hartikainen
Background formed from the iconic plastic construction bricks that gave me endless hours of fun when I was a lad.
Source Firkin
Snap! It’s a pattern, and it’s not grayscale! Of course you can always change the color in Photoshop.
Source Atle Mo
You know I’m a sucker for these. Well-crafted paper pattern.
Source Mihaela Hinayon
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
The perfect pattern for all your blogs about type, or type-related matters.
Source Atle Mo
A seamless paper background colored in pale yellow.
Source V. Hartikainen
Wasn't satisfied with the original's colouring. Too much component transfer and colormatrixes yet the results are lacking a bit. So this time it is a simple black to transparent fade, making it possible remixing easily once there will be other blending modes supported as well. Probably in inkscape 0.92.
Source Lazur URH
A seamlessly repeating background pattern of wood. The image is procedurally generated, and, I think, it's turned out quite well.
Source V. Hartikainen
Remixed from a drawing in 'The March of Loyalty', Letitia MacClintock, 1884.
Source Firkin
An alternative colour scheme to the original seamless pattern.
Source Firkin
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
Prismatic Geometric Tessellation Pattern 4 No Background
Source GDJ
A background tile of dark textile. Made this a long time ago and just now decided to publish it.
Source V. Hartikainen
Prismatic Abstract Geometric Background 5
Source GDJ
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
Remixed from a drawing in 'The March of Loyalty', Letitia MacClintock, 1884.
Source Firkin
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
A seamless pattern the starting point for which was a 'colour modulo' texture in Paint.net.
Source Firkin
A light gray fabric pattern with faded vertical stripes.
Source V. Hartikainen
You just can’t get enough of the fabric patterns, so here is one more for your collection.
Source Krisp Designs
Seamless Olive Green Web Background Image
Source V. Hartikainen