Black brick wall pattern. Brick your site up!
Source Alex Parker
Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo
Found on the ground in french cafe in kunming, Yunnan, china
Source Rejon
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Run a restaurant blog? Here you go. Done.
Source Andrijana Jarnjak
Prismatic Groovy Concentric Background 4
Source GDJ
A very dark spotted twinkle pattern for your twinkle needs.
Source Badhon Ebrahim
Prismatic Curved Diamond Pattern No Background
Source GDJ
Prismatic 3D Isometric Tessellation Pattern 6
Source GDJ
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
Derived from an image that was uploaded to Pixabay by starchim01
Source Firkin
A pattern formed from repeated instances of corner decoration 8. To get the basic tile select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Square design drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
A seamless pattern with green and yellow diagonal lines on top of a white dotted background.
Source V. Hartikainen
A free pink background pattern.
Source V. Hartikainen
The original enhanced with one of Inkscapes's filters.
Source Firkin