Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers
More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski
A seamless pattern formed from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Smooth Polaroid pattern with a light blue tint.
Source Daniel Beaton
Prismatic Snowflakes Pattern 3 No Background
Source GDJ
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas
Remixed from a JPG that was uploaded to Pixabay by theasad121
Source Firkin
Abstract Ellipses Background Grayscale
Source GDJ
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
This seamless background image should look nice on websites. It has a dark blue gray texture with vertical stripes, it tiles seamlessly and, like all of the background images here, it's free. So, if you like it, take it!
Source V. Hartikainen
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
A chequerboard pattern with a fruit theme. The fruits are from a posting by inkscapeforum.it.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
An interesting dark spotted pattern at an angle.
Source Hendrik Lammers
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
Derived from a corner decoration itself found as a jpg on Pixabay.
Source Firkin