Background pattern 272 (colour 3) #2055
Red CC 0A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
More Textures
Checkered Pattern #322
Grid CC BY-SA 3.0Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Dark Circles #306
Dark CC BY-SA 3.0People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
White Wall@2X #1106
Wall CC BY-SA 3.0Looks like an old wall. I guess that’s it then?
Source Viahorizon
Tex2res1 #721
Fabric CC BY-SA 3.0Number 3 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Background pattern 227 (colour 2) #2313
Blue CC 0A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
Spotted Light Yellow BG Pattern #1216
Yellow CC BY-SA 3.0This light yellow background pattern consists of an irregular pattern of spots. Here's a light background pattern with yellowish tint.
Source V. Hartikainen
Escheresque Dark@2X #1065
Dark CC BY-SA 3.0A comeback for you: the popular Escheresque, now in black.
Source Patten
Tactile Noise #5
Dark CC BY-SA 3.0A heavy dark gray base, some subtle noise and a 45-degree grid makes this look like a pattern with a tactile feel to it.
Source Atle Mo
Floral design 96 #1789
Dark CC 0From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Decorative divider 290 #1817
Dark CC 0From a drawing in 'Cassell's Library of English Literature', Henry Morley, 1883.
Source Firkin
Background pattern 309 (colour 3) #1864
Red CC 0Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
White Linen@2X #840
Light CC BY-SA 3.0Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
Cover Green #1283
Dark CC 0Zero CC tileable hard cover green book, scanned and made by me. CC0
Source Sojan Janso
Dark Brown Leather Texture, Seamless Tile #1092
Leather CC BY-SA 3.0The texture of this background image has some similarities with leather, and it's colored in a dark brown color. So, if you are looking for a dark brown background image for your website, this may be an option for you.
Source V. Hartikainen
gourd seamless pattern #2277
Brown CC 0The image depicts a seamless pattern which includes hexagonally-aligned gourds with BG in light-brown.
Source Yamachem
Background pattern pink and colours #2032
Colorful CC 0A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Black Linen 2@2X #104
Dark CC BY-SA 3.0A new take on the black linen pattern. Softer this time.
Source Atle Mo
Prismatic Abstract Geometric Background 4 No Black@2X #443
Dark CC 0Prismatic Abstract Geometric Background 4
Source GDJ