This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
A version without colours blended together to give a different look.
Source Firkin
Remixed from a drawing in 'The March of Loyalty', Letitia MacClintock, 1884.
Source Firkin
Prismatic Abstract Geometric Background 2 No Black
Source GDJ
From a drawing in 'Navigations de Alouys de Cademoste.-La Navigation du Capitaine Pierre Sintre', Alvise da ca da Mosto, 1895.
Source Firkin
Psychedelic Geometric Background No Black
Source GDJ
Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo
There are many carbon patterns, but this one is tiny.
Source Designova
So tiny, just 7 by 7 pixels – but still so sexy. Ah yes.
Source Dmitriy Prodchenko
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
Same classic 45-degree pattern, dark version.
Source Luke McDonald
Orange-red pattern for tiled backgrounds.
Source V. Hartikainen
A pale olive green background with a seamless texture.
Source V. Hartikainen
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
A repeating background with seamless texture of stone. There haven't been any stone-like backgrounds for a while, so I have decided to create one more. The rest can be found in the appropriate category.
Source V. Hartikainen
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857
Source Firkin
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.