This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
Greyscale version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Lovely pattern with splattered vintage speckles.
Source David Pomfret
Colorful Floral Background No Black
Source GDJ
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
This background pattern contains worn out colorful stripes as a texture.
Source V. Hartikainen
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
ZeroCC tileable stone texture, edited from pixabay, CC0
Source Sojan Janso
Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
This background image has seamless texture that resembles a surface of gray stone.
Source V. Hartikainen
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
A good starting point for a cardboard pattern. This would work well in a variety of colors.
Source Atle Mo
Background pattern originally a PNG drawn in Paint.net
Source Firkin
Prismatic Groovy Concentric Background No Black
Source GDJ
Wasn't satisfied with the original's colouring. Too much component transfer and colormatrixes yet the results are lacking a bit. So this time it is a simple black to transparent fade, making it possible remixing easily once there will be other blending modes supported as well. Probably in inkscape 0.92.
Source Lazur URH
Remixed from a PNG that was uploaded to Pixabay by VictorianLady
Source Firkin
Zero CC tileable bark texture, photographed and made by me. CC0
Source Sojan Janso
A background formed from an image of an old tile on the New York Metropolitan Museum of Art website. To get the base tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
The image depicts a shell seamless pattern.I used an OCAL clipart called "Shell" uploaded by "jgm104".Thanks.
Source Yamachem
More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski