"Colorful Stripes", Diagonally Striped Background #903
 Stripes  CC BY-SA 3.0

This background pattern contains worn out colorful stripes as a texture.

Source V. Hartikainen

 More Textures
Dark Fish [email protected] #1049
 Dark  CC BY-SA 3.0

It almost looks a bit blurry, but then again, so are fishes.

Source Petr Šulc

Background pattern 323 (colour 2) #1811
 Blue  CC 0

Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.

Source Firkin

Metal Pole Rusty & White #1652
 Metal  CC 0

Metal-Rusty. CC0 License.

Source Unknow

Grunge For Surfaces 6 #1403
 Dark  CC 0

Gamedev - Metal Textures. CC0 License.

Source Davit Masia

Tree Bark #1182
 Light  CC BY-SA 3.0

This one is something special. I’d call it a flat pattern, too. Very well done, sir!

Source GetDiscount

Fake Luxury #621
 Diamond  CC BY-SA 3.0

Fake or not, it’s quite luxurious.

Source Factorio.us Collective

Hexagonal pattern (colour) #2378
 Yellow  CC 0

A seamless pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i.

Source Firkin

Floral background 5 #2404
 Fabric  CC 0

A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I.

Source Firkin

Decorative divider 271 #1923
 Dark  CC 0

Remixed from a drawing in 'Incidents on a Journey through Nubia to Darfoor', F. Ensor, 1891.

Source Firkin

Bright Multicolored Floral [email protected] #560
 Noise  CC 0

Bright Multicolored Floral Background by Karen Arnold from PDP.

Source GDJ

Olive Green Web Background Image #1335
 Green  CC BY-SA 3.0

Seamless Olive Green Web Background Image

Source V. Hartikainen

Diagonal Striped Brick #679
 Stripes  CC BY-SA 3.0

Might not be super subtle, but quite original in its form.

Source Alex Smith

Abstract Paper-Like Background With Colorful Stains #1226
 Yellow  CC BY-SA 3.0

An abstract pale yellow paper-like background with stains colored in yellow and green.

Source V. Hartikainen

Background pattern 272 (colour 2) #2056
 Pink  CC 0

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

Source Firkin

Prismatic Curved Diamond Pattern 7 No [email protected] #548
 Noise  CC 0

Prismatic Curved Diamond Pattern 7 No Background

Source GDJ

Subtle Stripes #751
 Stripes  CC BY-SA 3.0

Vertical lines with a bumpy, yet crisp, feel to it.

Source Raasa

Repeating Stone-Like Background (Dark Brown) #1056
 Stone  CC BY-SA 3.0

A repeating background with dark brown stone-like texture and abstract pattern that looks like tree trunks.

Source V. Hartikainen

Background2 #259
 Wall  CC 0

rug texture background

Source Jilllio

Metal Pole Rusty & Light #1650
 Metal  CC 0

Metal-Rusty. CC0 License.

Source Unknow

"Grunge-Like" Background Pattern #1126
 Grunge  CC BY-SA 3.0

Background pattern made in "Grunge-Like" style. Available in both SVG and JPG formats. Edit to your needs then click the download button.

Source V. Hartikainen

Prismatic Snowflakes Pattern No Background #411
 Light  CC 0

Prismatic Snowflakes Pattern No Background

Source GDJ

Prismatic Dots Background [email protected] #504
 Noise  CC 0

Prismatic Dots Background 2

Source GDJ

Background pattern 246 (colour 3) #2184
 Green  CC 0

This was formed by distorting an image of a background on Pixabay.

Source Firkin

"Polished Blue Stone", Seamless Web Texture #1052
 Stone  CC BY-SA 3.0

An abstract web texture of a polished blue stone (or does it look more like ice).

Source V. Hartikainen

Light [email protected] #1204
 Gray  CC BY-SA 3.0

Like the name says, light and gray, with some small dots and circles.

Source Brenda Lay

Tapestry #747
 Diamond  CC BY-SA 3.0

Tiny and subtle. What’s not to love?

Source Pixeden

Subtle Dots #921
 Light  CC BY-SA 3.0

As simple and subtle as it gets. But sometimes that’s just what you want.

Source Designova

Church #633
 Paper  CC BY-SA 3.0

I have no idea what J Boo means by this name, but hey – it’s hot.

Source j Boo