Solid #845
Gray CC BY-SA 3.0A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
More Textures
Seamless tile 4 #1812
Red CC 0Not strictly seamless in that opposite edges are not identical. But they do marry up to make an interesting pattern
Source Firkin
Background pattern 223 (colour 6) #2348
Yellow CC 0Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Stamped Dots On Metal #1083
Metal CC BY-SA 3.0A dark metallic background with a pattern of stamped dots. Here's a dark "metallic" background pattern for you.
Source V. Hartikainen
Climpek #775
Grid CC BY-SA 3.0Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
Background pattern 198 (variant 2) #2509
Yellow CC 0A version without colours blended together to give a different look.
Source Firkin
Spiral pattern 3 #1934
Dark CC 0From a drawing in 'Danmarks Riges Historie af J. Steenstrup, Kr. Erslev, A. Heise, V. Mollerup, J. A. Fridericia, E. Holm, A. D. Jørgensen', 1897.
Source Firkin
Vintage pattern 2 #2295
Yellow CC 0Inspired by a pattern seen on a public domain image of a very old tile. To get the unit cell, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Light Blue Background Pattern #1161
Grid CC BY-SA 3.0This light blue background pattern is quite pleasing to the eye, it consists of a tiny rough grid pattern, which is seamless by design. That's it, if you like the color, you can use this seamless pattern in a web design without making any further modifications to it.
Source V. Hartikainen
Abstract Geometric Monochrome Pattern Prismatic No Background #385
Noise CC 0Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
Background pattern 24 #198
Dark CC 0The starting point for this was a texture drawn with the 'Radial Colors' plug-in in Paint.net.
Source Firkin
Pale Olive Green Background, Seamless Texture #902
Stripes CC BY-SA 3.0A pale olive green background with a seamless texture.
Source V. Hartikainen
Decorative divider 228 #2154
Dark CC 0Remixed from a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
Source Firkin
Prismatic Curved Diamond Pattern 6 No Background #545
Dark CC 0Prismatic Curved Diamond Pattern 6 No Background
Source GDJ
Black Leather Texture (Seamless) #1118
Leather CC BY-SA 3.0A seamless texture of black leather. I think it will look best when used in headers, footers or sidebars.
Source V. Hartikainen
Disks pattern #1890
Dark CC 0Remixed from a drawing that was uploaded to Pixabay by DavidZydd
Source Firkin
Wavy background #2017
Green CC 0A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Little Knobs@2X #311
Light CC BY-SA 3.0White little knobs, coming in at 10x10px. Sweet!
Source Amos
Cardboard Flat #961
Gray CC BY-SA 3.0Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
Ground Cracked 2 #1280
Wall CC 0Zero CC tileable ground (#2) cracked, crackled texture, made by me. CC0
Source Sojan Janso
Light Mesh #707
Fabric CC BY-SA 3.0Love me some light mesh on a Monday. Sharp.
Source Wilmotte Bastien
Flying swan pattern #1979
Blue CC 0Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Background pattern 225 (colour 4) #2324
Green CC 0Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
White Plaster #368
Wall CC BY-SA 3.0Sweet and subtle white plaster with hints of noise and grunge.
Source Phil Maurer