Snap! It’s a pattern, and it’s not grayscale! Of course you can always change the color in Photoshop.
Source Atle Mo
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
Background Wall, Art Abstract, white Well & CC0 texture.
Source Ractapopulous
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
If you don’t like cream and pixels, you’re in the wrong place.
Source Mizanur Rahman
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
Original seamless pattern with an Inkscape filter.
Source Firkin
Derived from an image that was uploaded to Pixabay by darkmoon1968
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
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
I’m starting to think I have a concrete wall fetish.
Source Atle Mo
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Pass parameters to the URL or edit the source code variables to configure the graph paper for the division desired.
Source JayNick
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
Prismatic Floral Pattern 3 Variation 3 No Background
Source GDJ
The original enhanced with one of Inkscapes's filters.
Source Firkin
Prismatic Abstract Background Design
Source GDJ
Sharp but soft triangles in light shades of gray.
Source Pixeden
There are many carbon patterns, but this one is tiny.
Source Designova
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
A pale olive green background with a seamless texture.
Source V. Hartikainen
A free background tile with a pattern of pink bump dots. This background tile is sweet! Moreover, it's designed for use as website backgrounds.
Source V. Hartikainen
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin