Cardboard Flat #961
 Gray  CC BY-SA 3.0

Not a flat you live inside, like in the UK – but a flat piece of cardboard.

Source Appleshadow

 More Textures
[email protected] #776
 Grid  CC BY-SA 3.0

Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.

Source Wassim

Green Web Background, Seamless tile #1332
 Green  CC BY-SA 3.0

Green Web Background, Seamless tile.

Source V. Hartikainen

Background pattern 260 #2094
 Orange  CC 0

Tile available in Inkscape using shift-alt-i on the selected rectangle

Source Firkin

Stone Wall & Dark #1543
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Gloomy Stripes #994
 Stripes  CC BY-SA 3.0

A dark striped seamless pattern suitable for use as a background on websites.

Source V. Hartikainen

Wood Web Background #870
 Wood  CC BY-SA 3.0

Here's a tile-able wood background image for use in web design.

Source V. Hartikainen

Background pattern 258 #2135
 Dark  CC 0

Remixed from a design on Pixabay. To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.

Source Firkin

Background pattern 238 (colour 2) #2228
 Green  CC 0

To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.

Source Firkin

Soft [email protected] #319
 Dark  CC BY-SA 3.0

Pattern #100! A black classic knit-looking pattern.

Source Factorio.us Collective

White Bed Sheet #821
 Light  CC BY-SA 3.0

Nothing like a clean set of bed sheets, huh?

Source Badhon Ebrahim

Bright Squares #87
 Light  CC BY-SA 3.0

It’s okay to be square! A nice light gray pattern with random squares.

Source Waseem Dahman

Billie [email protected] #1003
 Light  CC BY-SA 3.0

No relation to the band, but damn it’s subtle!

Source Thomas Myrman

Flower 193 #1794
 Green  CC 0

From a drawing in 'Prose and Verse ', William Linton, 1836.

Source Firkin

Crossword #1301
 Light  CC BY-SA 3.0

Borderline too subtle. Yes, I said it.

Source Ideawebme

Watercolor #1477
 Colorful  CC 0

Background Wall, Art Abstract, Watercolor Vintage style CC0 texture.

Source Ractapopulous

Tessellation 16 (colour 3) #2213
 Green  CC 0

The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.

Source Firkin

Decorative divider 250 #2070
 Dark  CC 0

Remixed from a drawing in 'Очерки Русской Исторіи въ памятникахъ быта', Petr Polevoi, 1879.

Source Firkin

Seamless Light Background Texture #1023
 Stone  CC BY-SA 3.0

Seamless Light Background Texture.

Source V. Hartikainen

Noisy [email protected] #977
 Dark  CC BY-SA 3.0

Little x’es, noise and all the stuff you like. Dark like a Monday, with a hint of blue.

Source Tom McArdle

White tiles #727
 Grid  CC BY-SA 3.0

A nice and simple white rotated tile pattern.

Source Another One

Feathered #1324
 Unknow  CC BY-SA 3.0

This is sort of fresh, but still feels a bit old school.

Source Martuchox

Flying swan pattern #1978
 Blue  CC 0

Remixed from a drawing in 'Line and form', Walter Crane, 1914.

Source Firkin

Ocean decorative divider #1904
 Dark  CC 0

Vector version of a png that was uploaded to Pixabay by pencilparker

Source Firkin

Seamless Green Curtain Background #1333
 Green  CC BY-SA 3.0

A free seamless background image with abstract texture of green "curtain".

Source V. Hartikainen

A dark wool background pattern with diagonal stripes #907
 Stripes  CC BY-SA 3.0

Feel free to download and use it, or see the rest of the dark background patterns that I have made. Anyway, I hope you will find something that you like.

Source V. Hartikainen

Background pattern 339 #1709
 Dark  CC 0

The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i

Source Firkin

Guitarpick #1682
 Paper  CC 0

Paper-Wallpaper. CC0 License.

Source Unknow

Retro Circles Background [email protected] #436
 Dark  CC 0

Retro Circles Background 8

Source GDJ