Cardboard #278
 Paper  CC BY-SA 3.0

A good starting point for a cardboard pattern. This would work well in a variety of colors.

Source Atle Mo

 More Textures
Background pattern 255 #2142
 Dark  CC 0

Colour version of the original pattern.

Source Firkin

French Stucco #697
 Paper  CC BY-SA 3.0

Fabric-ish patterns are close to my heart. French Stucco to the rescue.

Source Christopher Buecheler

Prismatic Groovy Concentric Background 5 No [email protected] #468
 Dark  CC 0

Prismatic Groovy Concentric Background 5 No Black

Source GDJ

Hibiscus Flowers Seamless Background #229
 Fabric  CC 0

PDP

Source GDJ

Skeletal Weave #931
 Light  CC BY-SA 3.0

Imagine you zoomed in 1000X on some fabric. But then it turned out to be a skeleton!

Source Angelica

Honey I’m Subtle #1038
 Gray  CC BY-SA 3.0

A mid-gray hexagon pattern.

Source Alex M. Balling

Bright [email protected] #88
 Light  CC BY-SA 3.0

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

Source Waseem Dahman

Fence 9 (colour 2) #2194
 Wood  CC 0

A browner version of the original weathered fence texture.

Source Firkin

Floral flourish #1816
 Dark  CC 0

Derived from a JPG that was uploaded to Pixabay by ractapopulous

Source Firkin

Little [email protected] #74
 Light  CC BY-SA 3.0

Subtle grunge and many little pluses on top.

Source Atle Mo

Paper Blank 3 #2117
 Paper  CC 0

CC0 textures, backgrounds.

Source SliverKnight

Stone Wall & Gray #1510
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Background pattern 322 #1823
 Yellow  CC 0

Derived from an image on Pixabay

Source Firkin

"Green Stone", Seamless Web Texture #1050
 Stone  CC BY-SA 3.0

A seamless web texture of "green stone".

Source V. Hartikainen

Carbon Fiber [email protected] #106
 Carbon  CC BY-SA 3.0

One more updated pattern. Not really carbon fiber, but it’s the most popular pattern, so I’ll give you an extra choice.

Source Atle Mo

Fence 9 #2195
 Wood  CC 0

Seamless texture made from a raster image on Pixabay.

Source Firkin

Background pattern 4 #223
 Noise  CC 0

A pattern derived from repeating unit cells each derived from part of a mosaic in paint.net. The starting point for the mosaic was a picture of some prawns!

Source Firkin

Seamless Paper Texture (Pale Yellow) #1217
 Yellow  CC BY-SA 3.0

A seamless paper background texture colored in pale yellow. This seamless texture is ideal for those who need a yellow background image for their website. The texture resembles paper.

Source V. Hartikainen

Part of Bayeux Tapestry 6 #2444
 Noise  CC 0

From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.

Source Firkin

Retro Squares Background [email protected] #798
 Noise  CC 0

Retro Squares Background 6

Source GDJ

Cream [email protected] #1017
 Paper  CC BY-SA 3.0

Submitted in a cream color, but you know how I like it.

Source Devin Holmes

Abstract Stars Geometric Pattern Prismatic No Background #384
 Noise  CC 0

Abstract Stars Geometric Pattern Prismatic No Background

Source GDJ

Dark Wall #817
 Dark  CC BY-SA 3.0

Just to prove my point, here is a slightly modified dark version.

Source Atle Mo

Flowery branch #1891
 Colorful  CC 0

Cut from a jpg on Pixabay and vectorized

Source Firkin

Wood [email protected] #371
 Wood  CC BY-SA 3.0

One of the few full-color patterns here, but this one was just too good to pass up.

Source Alexey Usoltsev

Pattern & Mix #1620
 Wall  CC 0

Fence. CC0 License.

Source Unknow

[email protected] #194
 Grid  CC BY-SA 3.0

Embossed lines and squares with subtle highlights.

Source Alex Parker

Offsetsquares #1688
 Paper  CC 0

Paper-Wallpaper. CC0 License.

Source Unknow

[email protected] #734
 Wall  CC BY-SA 3.0

Medium gray pattern with small strokes to give a weave effect.

Source Catherine

Prismatic Curved Diamond Pattern 3 No Background #162
 Diamond  CC 0

Prismatic Curved Diamond Pattern 3 No Background

Source GDJ