The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
From an image on opengameart.org shared by rubberduck.
Source Firkin
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
A free background tile with a pattern of pink bump dots. This background tile is sweet! Moreover, it's designed for use as website backgrounds.
Source V. Hartikainen
This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
Prismatic Chevrons Pattern 5 With Background
Source GDJ
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
This background pattern contains worn out colorful stripes as a texture.
Source V. Hartikainen
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
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
More in the paper realm, this time with fibers.
Source Jorge Fuentes
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Prismatic Abstract Line Art Pattern Background
Source GDJ
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Derived from an image that was uploaded to Pixabay by darkmoon1968
Source Firkin
Might not be super subtle, but quite original in its form.
Source Alex Smith
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This is sort of fresh, but still feels a bit old school.
Source Martuchox
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin