Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
A version without colours blended together to give a different look.
Source Firkin
Neat little photography icon pattern.
Source Hossam Elbialy
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
A nice and simple white rotated tile pattern.
Source Another One
This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
Alternative colour scheme. 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
One more sharp little tile for you. Subtle circles this time.
Source Blunia
Seamless Background For Websites. It has a texture similar to cork-board.
Source V. Hartikainen
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Background pattern originally a PNG drawn in Paint.net
Source Firkin
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A free seamless background with pink spots.
Source V. Hartikainen
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
Remixed from a drawing in 'Line and form", Walter Crane, 1914.
Source Firkin
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight