It’s okay to be square! A nice light gray pattern with random squares.
Source Waseem Dahman
Inspired by a drawing seen in 'City of Liverpool', James Picton, 1883.
Source Firkin
From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
A seamless pattern formed from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A lovely light gray pattern with stripes and a dash of noise.
Source V. Hartikainen
Derived from an image that was uploaded to Pixabay by darkmoon1968
Source Firkin
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
Sharp but soft triangles in light shades of gray.
Source Pixeden
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
Prismatic Hypnotic Pattern No Background
Source GDJ
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
A seamless background pattern with impressed gray dots.
Source V. Hartikainen
Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
A new one called white wall, not by me this time.
Source Yuji Honzawa
A simple bump filter made upon request at irc #inkscape at freenode. Made a screen capture of the making here: https://youtu.be/TGAWYKVLxQw
Source Lazur URH
A bit strange this one, but nice at the same time.
Source Diogo Silva
ZeroCC tileable stone texture, edited from pixabay, CC0
Source Sojan Janso
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