Dark Wall #817
Dark CC BY-SA 3.0Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
More Textures
Wavy background #2022
Blue CC 0CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
WaveCut@2X #76
Light CC BY-SA 3.0If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
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
Cross Stripes #47
Dark CC BY-SA 3.0Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
Retro Circles Background 8 No Black@2X #438
Dark CC 0Retro Circles Background 8 No Black
Source GDJ
Gold Triangular Seamless Pattern No Background #272
Light CC 0Gold Triangular Seamless Pattern No Background
Source GDJ
Paper Fibers@2X #1061
Paper CC BY-SA 3.0Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
Pinetree in tortoiseshell(亀甲松) #2538
Dark CC 0The image depicts a seamless pattern of Japanese Edo pattern called "kikkou-matsu" or "亀甲松" meaning " tortoiseshell-pinetree".The real pinetree is like this: https://jp.pinterest.com/pin/500744052301065077/
Source Yamachem
Background pattern 221 (colour) #2346
Yellow CC 0A seamless pattern formed from a tile made from page ornament 22. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Dark Tire #703
Dark CC BY-SA 3.0Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
Wall #1245
Wall CC 0Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Prismatic Groovy Concentric Background 2@2X #454
Noise CC 0Prismatic Groovy Concentric Background 2
Source GDJ
Textured Grid Paper #1316
Orange CC BY-SA 3.0A tile-able background for websites with paper-like texture and a grid pattern layered on top of it.
Source V. Hartikainen
Tex2res5@2X #726
Fabric CC BY-SA 3.0Number 5 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Seamless Pink Background #1220
Red CC BY-SA 3.0Here's a new background image for websites with a seamless pink texture. It should look beautiful with website themes where light pink background is needed. The background is seamless, therefore it should be used as a tiled background.
Source V. Hartikainen
Diagonal Striped Brick@2X #680
Stripes CC BY-SA 3.0Might not be super subtle, but quite original in its form.
Source Alex Smith
Gray Striped Fabric Pattern #1170
Fabric CC BY-SA 3.0Here's a new gray "fabric" pattern. Use it as backgrounds for websites or for other purposes.
Source V. Hartikainen
Feathered #1324
Unknow CC BY-SA 3.0This is sort of fresh, but still feels a bit old school.
Source Martuchox
Green Gobbler #85
Dark CC BY-SA 3.0Luxurious looking pattern (for a T-shirt maybe?) with a hint of green.
Source Simon Meek
Subtle Striped Brown Background Pattern #940
Stripes CC BY-SA 3.0Here's a brown background pattern with subtle stripes. I hope you'll like the color. If not, feel free to change it using an image editor, if you know how of course. Personally, I'm using GIMP to create these backgrounds.
Source V. Hartikainen
Background pattern 200 variant #2505
Pink CC 0A version without colours blended together to give a different look.
Source Firkin