Background pattern 238 #2229
Red CC 0To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
More Textures
Seamless Prismatic Pythagorean Line Art Pattern No Background@2X #570
Light CC 0Seamless Prismatic Pythagorean Line Art Pattern No Background. A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
Wavy background #2021
Pink CC 0CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Abstract Arbitrary Geometric Background@2X #498
Noise CC 0Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
Diagmonds #336
Dark CC BY-SA 3.0Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
Colorful Floral Background 3 No Black #485
Light CC 0Colorful Floral Background 3 No Black
Source GDJ
Decorative divider 247 #2077
Dark CC 0From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
"Dark Brick Wall", Background Pattern #1024
Stone CC BY-SA 3.0Like the name suggests, this background image consists of a pattern of dark bricks. It may be an option for you, if you are looking for something that looks like a brick wall for use as a background on web pages. It's not a masterpiece, but looks pretty nice when is tiled.
Source V. Hartikainen
Red Gemstone Tiles #1223
Red CC BY-SA 3.0This tiled background comes in red and consists of tiles that look like gemstones. It is more for blogs or social profiles, I think.
Source V. Hartikainen
Background pattern 41 #262
Fabric CC 0A seamless pattern the starting point for which was a 'light rays' rendering in Paint.net.
Source Firkin
polka dot seamless pattern #2531
Light CC 0The image depicts polka dot seamless pattern.
Source Yamachem
Prismatic Abstract Geometric Background 4 No Black@2X #443
Dark CC 0Prismatic Abstract Geometric Background 4
Source GDJ
"Polished Stone", Gray Background Pattern #1053
Stone CC BY-SA 3.0A seamless gray background texture suitable for use on websites. To me, it has the look of stone. Feel free to modify it to meet your needs (by making it a bit lighter or darker, for example).
Source V. Hartikainen
Prismatic Groovy Concentric Background 4 No Black #463
Noise CC 0Prismatic Groovy Concentric Background 4 No Black
Source GDJ
Background pattern 227 (colour 5) #2310
Colorful 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
Blizzard@2X #664
Paper CC BY-SA 3.0This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
Cells #1285
Paper CC 0Zero CC tileable hard cover cells, skin like, book texture. 4K, Scanned and made by me CC0
Source Sojan Janso
Zig Zag@2X #329
Dark CC BY-SA 3.0So tiny, just 7 by 7 pixels – but still so sexy. Ah yes.
Source Dmitriy Prodchenko
Blue Stripes Pattern #969
Stripes CC BY-SA 3.0A textured blue background pattern with vertical stripes.
Source V. Hartikainen