Rough Concrete Surface #1195
Concrete CC BY-SA 3.0This one resembles a black concrete wall when is tiled. It should look great, at least with dark website themes.
Source V. Hartikainen
More Textures
Dark Blue Gray Wallpaper Texture #901
Stripes CC BY-SA 3.0This seamless background image should look nice on websites. It has a dark blue gray texture with vertical stripes, it tiles seamlessly and, like all of the background images here, it's free. So, if you like it, take it!
Source V. Hartikainen
Black Paper #55
Dark CC BY-SA 3.0Black paper texture, based on two different images.
Source Atle Mo
Based from Design Kindle
Decorative divider 288 #1820
Dark CC 0From a drawing in 'Navigations de Alouys de Cademoste.-La Navigation du Capitaine Pierre Sintre', Alvise da ca da Mosto, 1895.
Source Firkin
Noise Lines@2X #898
Paper CC BY-SA 3.0Lovely pattern with some good-looking non-random noise lines.
Source Zucx
Background pattern 339 (colour) #1708
Yellow CC 0The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Criss-cross pattern #1895
Dark CC 0A criss-cross pattern similar to one I saw mown into a sports field.
Source Firkin
Flying swan pattern #1979
Blue CC 0Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Green Dust & Scratches@2X #108
Wall CC BY-SA 3.0Snap! It’s a pattern, and it’s not grayscale! Of course you can always change the color in Photoshop.
Source Atle Mo
Seamless Textured Paper Background #1075
Paper CC BY-SA 3.0A seamless textured paper for backgrounds. Colored in pale orange hues.
Source V. Hartikainen
Scenery decorative divider #1909
Dark CC 0Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Blue Stripes Pattern #969
Stripes CC BY-SA 3.0A textured blue background pattern with vertical stripes.
Source V. Hartikainen
Cross pattern (negative) #2332
Dark CC 0A seamless pattern formed from cross 4. To get the original tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Office #957
Dark CC BY-SA 3.0I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
Background pattern 226 #2321
Brown CC 0A seamless pattern from a tile made from a jpg on Pixabay. To get the tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Background pattern 306 (colour 4) #1877
Colorful CC 0Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Prismatic Abstract Geometric Background 4 #271
Noise CC 0Prismatic Abstract Geometric Background 4
Source GDJ
Rain pattern #1933
Water CC 0To get the repeating unit, select the rectangle in Inkscape and use shift+alt+i
Source Firkin
polka dot seamless pattern remix #2498
Blue CC 0This is the remix of "polka dot seamless pattern".The image depicts polka dot seamless pattern.
Source Yamachem
flower seamless pattern-remix #2445
Fabric CC 0This is a remix of "flower seamless pattern".I rotated the original image by 90 degrees.This is a seamless pattern of flowers.These horizontal wavy lines are one of Edo patterns which is called "tatewaku or tachiwaku or 立湧" that represents uprising steam or vapor.
Source Yamachem
Parquet flooring pattern (colour 2) #2426
Green CC 0A seamless pattern recreated from an image on Pixabay. It is reminiscent of parquet flooring and is formed from a square tile, which can be recovered in Inkscape by selecting the ungrouped rectangle and using shift-alt-I together.
Source Firkin
Robots #125
Dark CC BY-SA 3.0And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio