Cardboard Flat@2X #962
Gray CC BY-SA 3.0Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
More Textures
Pyramid #895
Light CC BY-SA 3.0Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
Background pattern 315 (colour 5) #1841
Yellow CC 0The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Tex2res3 #723
Fabric CC BY-SA 3.0Number 4 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Wooden Background For Websites #873
Wood CC BY-SA 3.0This background has abstract texture with some similarities to wood.
Source V. Hartikainen
Bright Multicolored Floral Background #559
Noise CC 0Bright Multicolored Floral Background by Karen Arnold from PDP.
Source GDJ
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
Escheresque@2X #778
Light CC BY-SA 3.0Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
Soft Kill@2X #319
Dark CC BY-SA 3.0Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
Colourful background #2008
Colorful CC 0Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
P4 #1111
Light CC BY-SA 3.0I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
Fabric pattern #2402
Fabric CC 0Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin