It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
Subtle scratches on a light gray background.
Source Andrey Ovcharov
Smooth Polaroid pattern with a light blue tint.
Source Daniel Beaton
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Seamless Prismatic Pythagorean Line Art Pattern No Background. A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
Crossing lines with a subtle emboss effect on a dark background.
Source Stefan Aleksić
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
Prismatic Abstract Geometric Background 4 No Black
Source GDJ
It looks very nice I think.
Source V. Hartikainen
This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
Very simple, very blu(e). Subtle and nice.
Source Seb Jachec
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
Formed by heavily distorting part of a an image of a fish uploaded to Pixabay by GLady
Source Firkin
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
ZeroCC tileabel stone granite texture, edited from pixabay. CC0
Source Sojan Janso
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Derived from an image that was uploaded to Pixabay by darkmoon1968
Source Firkin