This pattern comes in orange, and it looks as if it is "made of glass".
Source V. Hartikainen
Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin
A seamless design of flowers remixed from a jpg on Pixabay by Prawny.
Source Firkin
Prismatic Triangular Seamless Pattern III With Background
Source GDJ
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
Remixed from a drawing in 'Analecta Eboracensia', Thomas Widdrington, 1897.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Background Wall, Art Abstract, white Well & CC0 texture.
Source Ractapopulous
Prismatic Hypnotic Pattern 2 No Background
Source GDJ
The name Paisley reminds me of an old British servant. That’s just me.
Source Swetha
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
From a drawing in 'Cowdray: the history of a great English House', Julia Roundell, 1884.
Source Firkin
This beige background pattern resembles a concrete wall with engravings or something similar to it.
Source V. Hartikainen
Derived from an image that was uploaded to Pixabay by darkmoon1968
Source Firkin
Very simple, very blu(e). Subtle and nice.
Source Seb Jachec
From a drawing of the coat of arms of the Ottoman Empire on Wikimedia.
Source Firkin
Embossed lines and squares with subtle highlights.
Source Alex Parker
One more brick pattern. A bit more depth to this one.
Source Benjamin Ward
Dark blue concrete wall with some small dust spots.
Source Atle Mo
Formed from decorative divider 184 in paint.net. Vectorised with Vector Magic.
Source Firkin
Prismatic Curved Diamond Pattern 5 No Background
Source GDJ