To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
A seamlessly tile-able grunge background image.
Source V. Hartikainen
Background pattern originally a PNG drawn in Paint.net
Source Firkin
Clean and crisp lines all over the place. Wrap it up with this one.
Source Dax Kieran
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Remixed from a drawing in 'Prehistoric Man: researches into the origin of civilisation in the old and the new world', Daniel Wilson, 1876.
Source Firkin
This is a remix of "blue wave-seigaiha".I hope this subtle color version of Seigaiha would be suitable for background .
Source Yamachem
Alternative colour scheme to the original.
Source Firkin
A seamless pattern formed from cross 4. To get the original tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
An abstract texture of water. It's not perfect, but will do. You may download if you like it.
Source V. Hartikainen
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
Oh yes, it happened! A pattern in full color.
Source Atle Mo
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
Black brick wall pattern. Brick your site up!
Source Alex Parker
A version without colours blended together to give a different look.
Source Firkin
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Three shades of gray makes this pattern look like a small carbon fiber surface. Great readability even for small fonts.
Source Atle Mo
A pattern drawn in Paint.net and vectorized in Inkscape.
Source Firkin