"Dark Red Canvas", Seamless Web Texture@2X #1222
Red CC BY-SA 3.0A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
More Textures
Diamond pattern 2 (colour 4) #2265
Red CC 0From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Grey Washed Wall #1128
Wall CC BY-SA 3.0This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
Flourish decorative divider #1732
Dark CC 0Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
Background pattern green #1947
Green CC 0To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Gun Metal@2X #361
Dark CC BY-SA 3.0With a name this awesome, how can I go wrong?
Source Nikolay Boltachev
SOS #1180
Light CC BY-SA 3.0I have no idea how to describe this one, but it’s light and delicate.
Source JBasoo
Tessellation 16 (colour 3) #2213
Green CC 0The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Decorative divider 199 #2436
Dark CC 0From a drawing in 'Jardyne's Wife', Charles Wills, 1891.
Source Firkin
Subtle White Feathers #1103
Light CC BY-SA 3.0This one is amazing, truly original. Go use it!
Source Viahorizon
Floral pattern 14 #1754
Yellow CC 0The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Scribble Light@2X #740
Paper CC BY-SA 3.0A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
Ribbon pattern 2 (version 2, colour 6) #2034
Pink CC 0The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Background pattern 228 #2308
Colorful CC 0Non-seamless pattern drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
stone filter pack #154
Stone CC 0This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
White Well & Star #1700
Wall CC 0Background Wall, Art Abstract, Star Well & CC0 texture.
Source Ractapopulous
Polonez Pattern@2X #335
Gray CC BY-SA 3.0A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
Wild Oliva #988
Dark CC BY-SA 3.0Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
GPlay@2X #736
Light CC BY-SA 3.0A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
Bamboo Background Pattern #1330
Green CC BY-SA 3.0This background pattern looks like bamboo to me. Feel free to download it for your website (for your blog perhaps?).
Source V. Hartikainen