Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
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
A comeback for you: the popular Escheresque, now in black.
Source Patten
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
Used correctly, this could be nice. Used in a bad way, all hell will break loose.
Source Atle Mo
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
The first pattern on here using opacity. Try it on a site with a colored background, or even using mixed colors.
Source Nathan Spady
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
This is the remix of an OCAL clipart called "Rain on Window" uploaded by "pagarmidna".Thanks.This is a seamless pattern of raindrops.
Source Yamachem
Did anyone say The Hoff? This pattern is in no way related to Baywatch.
Source Josh Green
Dark blue concrete wall with some small dust spots.
Source Atle Mo
Everyone loves a diamond, right? Make your site sparkle.
Source AJ Troxell
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Green Background Pattern
Source V. Hartikainen