Luxurious looking pattern (for a T-shirt maybe?) with a hint of green.
Source Simon Meek
A background pattern with wavy green vertical stripes. This one has green stripes on a white background. Download if you like it.
Source V. Hartikainen
Prismatic Floral Background No Black
Source GDJ
A frame using leaves from an image that was uploaded to Pixabay by mayapujiati
Source Firkin
Formed by heavily distorting part of a an image of a fish uploaded to Pixabay by GLady
Source Firkin
Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
A dark pattern made out of 3×3 circles and a 1px shadow. This works well as a carbon texture or background.
Source Atle Mo
Colourful background achieved with gradient fills.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Rounded Squares Grid 3 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
Paper pattern with small dust particles and 45-degree strokes.
Source Atle Mo
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
A light gray background pattern with seamless fabric-like texture and almost unnoticeable stripes.
Source V. Hartikainen
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
Prismatic Floral Pattern 3 Variation 3 No Background
Source GDJ
You know you can’t get enough of these linen-fabric-y patterns.
Source James Basoo
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
Heavily remixed from a drawing in 'Barbara Leybourne; a story of eighty years ago', Sarah Hamer, 1889.
Source Firkin
Here's a tile-able wood background image for use in web design.
Source V. Hartikainen
Detailed but still subtle and quite original. Lovely gray shades.
Source Kim Ruddock