Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
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
Prismatic Triangular Seamless Pattern III With Background
Source GDJ
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
Prismatic Geometric Pattern Background No Black
Source GDJ
This is a remix of "geometrical pattern 01".
Source Yamachem
Alternative colour scheme for the original floral pattern.
Source Firkin
Zero CC tileable bark texture, photographed and made by me. CC0
Source Sojan Janso
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Alternative colour scheme.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
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
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
Psychedelic Geometric Background No Black
Source GDJ
Subtle scratches on a light gray background.
Source Andrey Ovcharov
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
Zero CC tileable hard cover cells book texture, 4k, scanned and made by me. CC0
Source Sojan Janso
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
A comeback for you: the popular Escheresque, now in black.
Source Patten
A slightly grainy paper pattern with small horizontal and vertical strokes.
Source Atle Mo