Not so subtle. These tileable wood patterns are very useful.
Source Elemis
You know I’m a sucker for these. Well-crafted paper pattern.
Source Mihaela Hinayon
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
The base gradient edited so now more details are rendered.
Source Lazur URH
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Colorful Floral Background 3 No Black
Source GDJ
Hey, you never know when you’ll need a bird pattern, right?
Source Pete Fecteau
Everyone needs some stardust. Sprinkle it on your next project.
Source Atle Mo
CC0 and seamless wellington boot pattern.
Source SliverKnight
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Sharp pixel pattern, just like the good old days.
Source Paridhi
Can never have too many knitting patterns, especially as nice as this.
Source Victoria Spahn
Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
The name Paisley reminds me of an old British servant. That’s just me.
Source Swetha
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
This is the remix of an OCAL clipart called "Art Nouveau ornament" uploaded by "microcosme".Thanks.This is a seamless pattern of an Art Nouveau ornament.
Source Yamachem
This one looks like a cork panel. Feel free to use it as a tiled background on your blog or website.
Source V. Hartikainen
Same classic 45-degree pattern, dark version.
Source Luke McDonald
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Prismatic Abstract Line Art Pattern Background 2
Source GDJ