This one is something special. I’d call it a flat pattern, too. Very well done, sir!
Source GetDiscount
A dark metal plate with an embossed grid pattern and a bit of rust. Here's a dark metal plate texture for use as a tiled background on web pages.
Source V. Hartikainen
Prismatic Hypnotic Pattern 2 No Background
Source GDJ
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
Abstract Stars Geometric Pattern Prismatic No Background
Source GDJ
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green
Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
Prismatic Abstract Line Art Pattern Background
Source GDJ
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
Utilising a bird from s-light and some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
Formed from decorative divider 184 in paint.net. Vectorised with Vector Magic.
Source Firkin
Dark, lines, noise, tactile. You get the drift.
Source Anatoli Nicolae
Oh yes, it happened! A pattern in full color.
Source Atle Mo
The classic notebook paper with horizontal stripes.
Source Are Sundnes
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
The texture of this background image has some similarities with leather, and it's colored in a dark brown color. So, if you are looking for a dark brown background image for your website, this may be an option for you.
Source V. Hartikainen
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
A seamless pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Derived from a design in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo
More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski