Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Seamless Prismatic Quadrilateral Line Art Pattern No Background
Source GDJ
From a drawing in 'Bond Slaves. The story of a struggle.', Isabella Varley, 1893.
Source Firkin
A seamless design of flowers remixed from a jpg on Pixabay by Prawny.
Source Firkin
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
An abstract Background pattern of purple twisty patterns.
Source TikiGiki
Remixed from a JPG that was uploaded to Pixabay by theasad121
Source Firkin
A seamless pattern formed from background pattern 102
Source Firkin
Kaleidoscope Prismatic Abstract No Background
Source GDJ
A heavy hitter at 400x400px, but lovely still.
Source Breezi
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
Prismatic Geometric Pattern Background 2 No Black
Source GDJ
Zero CC Mossy stone tileable texture, photographed and made by me. CC0
Source Sojan Janso
I love the movie Pineapple Express, and I’m also liking this Pineapple right here.
Source Audee Mirza
Prismatic Curved Diamond Pattern 5 No Background
Source GDJ
Remixed from a drawing in 'Jezebel's Daughter', Wilkie Collins 1880
Source Firkin
Alternative colour scheme for the original floral pattern.
Source Firkin
A repeating background of beige paper with vintage look. Repeats to infinity, as usual.
Source V. Hartikainen
Background Wall, Art Abstract, Watercolor Vintage style CC0 texture.
Source Ractapopulous
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov