A comeback for you: the popular Escheresque, now in black.
Source Patten
Oh yes, it happened! A pattern in full color.
Source Atle Mo
A new one called white wall, not by me this time.
Source Yuji Honzawa
Original minus the background
Source Firkin
Adapted 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
Prismatic Polka Dots 3 No Background
Source GDJ
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I.
Source Firkin
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
A seamless light gray paper texture with horizontal double lines.
Source V. Hartikainen
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Love me some light mesh on a Monday. Sharp.
Source Wilmotte Bastien
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
No idea what Nistri means, but it’s a crisp little pattern nonetheless.
Source Markus Reiter
This is a remix of "geometrical pattern 01".
Source Yamachem
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Prismatic Abstract Background Design No Black
Source GDJ
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
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin