Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
Geometric lines are always hot, and this pattern is no exception.
Source Listvetra
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda
I’m starting to think I have a concrete wall fetish.
Source Atle Mo
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
Psychedelic Geometric Background No Black
Source GDJ
An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav
The original enhanced with some gradients.
Source Firkin
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Might not be super subtle, but quite original in its form.
Source Alex Smith
Use shift+alt+i on the selected rectangle in Inkscape to get the tile this is based on
Source Firkin
Tiny circle waves, almost like the ocean.
Source Sagive
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
A dark metallic background with a pattern of stamped dots. Here's a dark "metallic" background pattern for you.
Source V. Hartikainen
Love me some light mesh on a Monday. Sharp.
Source Wilmotte Bastien
One more updated pattern. Not really carbon fiber, but it’s the most popular pattern, so I’ll give you an extra choice.
Source Atle Mo
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin