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
A browner version of the original weathered fence texture.
Source Firkin
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
This one is so simple, yet so good. And you know it. Has to be in the collection.
Source Gluszczenko
No, not the band but the pattern. Simple squares in gray tones, of course.
Source Atle Mo
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
The image depicts a seamless pattern of a snow crystal.I referred to a book called ”sekka-zusetsu” or "雪華図説" which means an illustrated explanation about snow crystals.This book was published in 1832 (天保3年) or Edo period.For more about "雪華図説",see here:dl.ndl.go.jp/info:ndljp/pid/2536975
Source Yamachem
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
A pattern drawn in Paint.net and vectorized in Inkscape.
Source Firkin
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
With a name like this, it has to be hot. Diagonal lines in light shades.
Source Isaac
Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
Adapted from an image that was uploaded to Pixabay by Anerma.
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
The following orange background pattern resembles a honeycomb.
Source V. Hartikainen
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Zero CC bark from fur tree tileable texture, photographed and made by me. CC0
Source Sojan Janso
Free tiled background with colorful stripes and white splatter.
Source V. Hartikainen