Remixed from a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
A colourful background drawn originally in paint.net and vectorised in Vector Magic.
Source Firkin
Seamless Olive Green Web Background Image
Source V. Hartikainen
Tiny circle waves, almost like the ocean.
Source Sagive
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Prismatic Groovy Concentric Background 3
Source GDJ
It’s big, it’s gradient—and it’s square.
Source Brankic1979
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Farmer could be some sort of fabric pattern, with a hint of green.
Source Fabian Schultz
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
Prismatic Abstract Line Art Pattern Background
Source GDJ
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
So tiny, just 7 by 7 pixels – but still so sexy. Ah yes.
Source Dmitriy Prodchenko
Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ
I love these crisp, tiny, super subtle patterns.
Source Badhon Ebrahim
ZeroCC tileable beechwood wood texture, generated in Neo Texture Edit by me. CC0
Source Sojan Janso
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
Black paper texture, based on two different images.
Source Atle Mo
Based from Design Kindle
Another fairly simple design drawn in Paint.net and vectorized in Inkscape.
Source Firkin