Transparent Square Tiles #298
Grid CC BY-SA 3.0The first pattern on here using opacity. Try it on a site with a colored background, or even using mixed colors.
Source Nathan Spady
More Textures
Green Subtle Web Texture #1334
Green CC BY-SA 3.0A seamless green background texture. The image is distributed under a Creative Commons License (like all of the images here).
Source V. Hartikainen
Background pattern blue #1949
Blue CC 0To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Grunge Wall@2X #82
Wall CC BY-SA 3.0Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
Prismatic Groovy Concentric Background 4 No Black@2X #464
Noise CC 0Prismatic Groovy Concentric Background 4 No Black
Source GDJ
Wild Oliva@2X #989
Dark CC BY-SA 3.0Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
Brown Canvas, Web Texture #1171
Fabric CC BY-SA 3.0A web texture of brown canvas. Will look great, when used in dark web designs.
Source V. Hartikainen
Fabric (Plaid) #591
Fabric CC BY-SA 3.0You know you can’t get enough of these linen-fabric-y patterns.
Source James Basoo
Background pattern 197 #2513
Green CC 0A version without colours blended together to give a different look.
Source Firkin
Background pattern 323 (colour 5) #1808
Noise CC 0Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
Stylized lion design #2089
Dark CC 0Derived from a drawing in 'Historiske Afhandlinger', Adolf Jorgensen, 1898.
Source Firkin
Dark Brick Wall #135
Wall CC BY-SA 3.0Black brick wall pattern. Brick your site up!
Source Alex Parker
Noisy #45
Paper CC BY-SA 3.0Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
Subtle Dark Vertical@2X #608
Dark CC BY-SA 3.0Classic vertical lines, in all its subtlety.
Source Cody L
Floral design 94 #1792
Yellow CC 0From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Decorative divider #1996
Dark CC 0From a drawing in 'Two Women in the Klondike', Mary Hitchcock, 1899.
Source Firkin
Decorative divider 233 #2145
Dark CC 0From a drawing in 'Hyde Park from Domesday-Book to date', John Ashton, 1896.
Source Firkin
Black Paper #55
Dark CC BY-SA 3.0Black paper texture, based on two different images.
Source Atle Mo
Based from Design Kindle
Pinstriped Suit #665
Dark CC BY-SA 3.0Just like your old suit, all striped and smooth.
Source Alex Berkowitz
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
Silver Scales@2X #190
Light CC BY-SA 3.0Turn your site into a dragon with this great scale pattern.
Source Alex Parker
Olive Green Web Background Image #1335
Green CC BY-SA 3.0Seamless Olive Green Web Background Image
Source V. Hartikainen
Prismatic Abstract Background Design #403
Noise CC 0Prismatic Abstract Background Design
Source GDJ
Vaio #675
Diamond CC BY-SA 3.0I’m guessing this is related to the Sony Vaio? It’s a nice pattern no matter where it’s from.
Source Zigzain