To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Based on an image that was uploaded to Pixabay by devanath
Source Firkin
Prismatic Abstract Line Art Pattern Background
Source GDJ
It looks very nice I think.
Source V. Hartikainen
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
This is a remix of "geometrical pattern 01".
Source Yamachem
Pass parameters to the URL or edit the source code variables to configure the graph paper for the division desired.
Source JayNick
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Orange-red pattern for tiled backgrounds.
Source V. Hartikainen
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin