A light background pattern with diagonal stripes. Here's a simple light striped background for you.
Source V. Hartikainen
Prismatic Floral Background No Black
Source GDJ
Remixed from a drawing in 'Line and form", Walter Crane, 1914.
Source Firkin
Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
Remixed from a JPG that was uploaded to Pixabay by susanlu4esm
Source Firkin
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
I love these crisp, tiny, super subtle patterns.
Source Badhon Ebrahim
Used a cherry by doctormo to make this seamless pattern
Source Firkin
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
ZeroCC tileabel stone granite texture, edited from pixabay. CC0
Source Sojan Janso
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
Coming in at 666x666px, this is an evil big pattern, but nice and soft at the same time.
Source Atle Mo
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Seamless pattern made from a tile that can be obtained in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin