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
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
Here's a tile-able wood background image for use in web design.
Source V. Hartikainen
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Prismatic Groovy Concentric Background
Source GDJ
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
Nicely executed tiling for an interesting pattern.
Source Ignasi Àvila Padró
Here's a dark background pattern that contains a steel grid pattern as a texture. Use it as a website background or for other purposes. It's free!
Source V. Hartikainen
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
A seamless background texture of old cardboard.
Source V. Hartikainen
Derived from a corner decoration itself found as a jpg on Pixabay.
Source Firkin
Lovely pattern with splattered vintage speckles.
Source David Pomfret
Oh yes, it happened! A pattern in full color.
Source Atle Mo
Looks like an old rug or a computer chip.
Source Patutin Sergey