Kaleidoscope Prismatic Abstract No Background
Source GDJ
A dark metallic background with a pattern of stamped dots. Here's a dark "metallic" background pattern for you.
Source V. Hartikainen
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
White little knobs, coming in at 10x10px. Sweet!
Source Amos
Uses spirals from Pixabay. To get the basic tile select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Background Wall, Art Abstract, Star Well & CC0 texture.
Source Ractapopulous
A repeating background of thick textured paper. Actually, it turned out to look like something between a paper and fabric.
Source V. Hartikainen
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
From a drawing in 'Cowdray: the history of a great English House', Julia Roundell, 1884.
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
If you’re sick of the fancy 3D, grunge and noisy patterns, take a look at this flat 2D brick wall.
Source Listvetra
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I. Version with black background.
Source Firkin
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
A seamless background pattern of dark brown wood planks.
Source V. Hartikainen
Snap! It’s a pattern, and it’s not grayscale! Of course you can always change the color in Photoshop.
Source Atle Mo
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
This was formed by distorting an image of a background on Pixabay.
Source Firkin