Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers
Prismatic Abstract Background Design No Black
Source GDJ
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
A seamless background pattern of dark brown wood planks.
Source V. Hartikainen
Derived from an image that was uploaded to Pixabay by darkmoon1968
Source Firkin
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Black brick wall pattern. Brick your site up!
Source Alex Parker
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
A new one called white wall, not by me this time.
Source Yuji Honzawa
The image depicts an edo-era pattern called "same-komon" or "鮫小紋"which looks like a shark skin.The "same" in Japanese means shark in English.
Source Yamachem
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A free black metallic background pattern. Here's a new pattern I made that looks metallic.
Source V. Hartikainen
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki