Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
Prismatic Basic Pattern 2 No Background
Source GDJ
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Seamless Background For Websites. It has a texture similar to cork-board.
Source V. Hartikainen
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
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
Can never have too many knitting patterns, especially as nice as this.
Source Victoria Spahn
Background Wall, Art Abstract, white Well & CC0 texture.
Source Ractapopulous
Remixed from an image on Pixabay, the original having been uploaded by darkmoon1968.
Source Firkin
Three shades of gray makes this pattern look like a small carbon fiber surface. Great readability even for small fonts.
Source Atle Mo
The image depicts polka dot seamless pattern.
Source Yamachem
Prismatic Hypnotic Pattern 2 No Background
Source GDJ
A background tile for web with abstract repeating texture of dark "stone wall".
Source V. Hartikainen
Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
A slightly grainy paper pattern with small horizontal and vertical strokes.
Source Atle Mo
Bright Multicolored Floral Background by Karen Arnold from PDP.
Source GDJ
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
Prismatic Rounded Squares Grid 4 No Background
Source GDJ
A seamless background of warped stripes on paper.
Source V. Hartikainen
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green