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
Asfalt #927
Dark CC BY-SA 3.0A very dark asfalt pattern based off of a photo taken with my iPhone.
Source Atle Mo
Skin Side Up #847
Light CC BY-SA 3.0White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
HIXS Evolution #609
Dark CC BY-SA 3.0Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas
Diamond Upholstery #767
Diamond CC BY-SA 3.0A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
Dark & Gray #1299
Stone CC 0ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso
"Reptile Skin", Seamless Texture #1119
Leather CC BY-SA 3.0A free seamless texture of reptile skin colored in a dark brown color. As always, you may use it as a repeated background image in your web design works, or for any other purposes.
Source V. Hartikainen
Notebook@2X #1179
Gray CC BY-SA 3.0This one is super crisp at 2X. Lined paper with some dust and scratches.
Source HQvectors
Background pattern 21 #205
Light CC 0A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
ecorative divider 209 #2365
Dark CC 0Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
Argyle #643
Dark CC BY-SA 3.0Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
Prismatic Abstract Background Design #403
Noise CC 0Prismatic Abstract Background Design
Source GDJ
Background pattern 223 (colour 5) #2349
Blue CC 0Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Fence 7 #2576
Wood CC 0A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Prismatic Abstract Geometric Background 5 No Black@2X #792
Noise CC 0Prismatic Abstract Geometric Background 5 No Black
Source GDJ
Background pattern 238 (colour 2) #2228
Green CC 0To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Smooth Wall@2X #28
Light CC BY-SA 3.0Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
Geometric pattern 7 #1929
Dark CC 0To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
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