Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo
A background formed from an image of an old tile on the New York Metropolitan Museum of Art website. To get the base tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Remixed from a drawing in 'Очерки Русской Исторіи въ памятникахъ быта', Petr Polevoi, 1879.
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
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
A seamless pattern made from the gold Penrose triangle by GDJ and the two remixes
Source Firkin
A repeating background for websites with a texture of black groove stripes.
Source V. Hartikainen
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
Greyscale version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin
Beautiful dark noise pattern with some dust and grunge.
Source Vincent Klaiber
Prismatic Geometric Tessellation Pattern 4 No Background
Source GDJ
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
Smooth Polaroid pattern with a light blue tint.
Source Daniel Beaton
Prismatic Geometric Pattern Background
Source GDJ