Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
Prismatic Abstract Line Art Pattern Background
Source GDJ
Adapted from an image that was uploaded to Pixabay by Anerma.
Source Firkin
Prismatic Groovy Concentric Background
Source GDJ
A classic dark tile for a bit of vintage darkness.
Source Listvetra
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
This background pattern has futuristic look. So, maybe it could be used on websites or blogs dedicated to video games?!
Source V. Hartikainen
Non-seamless pattern drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
A floral background formed from numerous clones of flower 117.
Source Firkin
Seamless pattern the basic tile for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Sharp but soft triangles in light shades of gray.
Source Pixeden
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
Used the 6th circle pattern designed by Viscious-Speed to create a print that can be used for card making or scrapbooking. Save as a PDF file for the best printing option.
Source Lovinglf
A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
A seamless pattern formed from miutopia's cakes on a tablecloth.
Source Firkin
Beautiful dark noise pattern with some dust and grunge.
Source Vincent Klaiber
A brown seamless wood texture in a form of stripe pattern. The result has turned out pretty well, in my opinion.
Source V. Hartikainen
Background pattern made in "Grunge-Like" style. Available in both SVG and JPG formats. Edit to your needs then click the download button.
Source V. Hartikainen
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
Black brick wall pattern. Brick your site up!
Source Alex Parker
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
Background pattern originally a PNG drawn in Paint.net
Source Firkin
Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers