Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
A comeback for you: the popular Escheresque, now in black.
Source Patten
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
Black brick wall pattern. Brick your site up!
Source Alex Parker
Remixed from a drawing in 'Incidents on a Journey through Nubia to Darfoor', F. Ensor, 1891.
Source Firkin
A large (588x375px) sand-colored pattern for your ever-growing collection. Shrink at will.
Source Alex Tapein
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
Just a nice looking textured pattern with faded blue stripes. Well, that's it for today... one background a day, as usual.
Source V. Hartikainen
A dark metal plate with an embossed grid pattern and a bit of rust. Here's a dark metal plate texture for use as a tiled background on web pages.
Source V. Hartikainen
From a drawing in 'Hubert Montreuil, or the Huguenot and the Dragoon', Francisca Ouvry, 1873.
Source Firkin
This is the remix of an OCAL clipart called "Art Nouveau ornament" uploaded by "microcosme".Thanks.This is a seamless pattern of an Art Nouveau ornament.
Source Yamachem
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
The name is totally random, but hey, it sounds good.
Source Atle Mo
Derived from a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Your eyes can trip a bit from looking at this – use it wisely.
Source Michal Chovanec
Continuing the geometric trend, here is one more.
Source Mike Warner
An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard
Prismatic Floral Pattern 3 Variation 3 No Background
Source GDJ