Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers
Prismatic Groovy Concentric Background No Black
Source GDJ
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
The image is a remix of "edo pattern-samekomon".I changed the color of dots from black to white and added BG in light-yellow.
Source Yamachem
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Prismatic Rounded Squares Grid 3 No Background
Source GDJ
The original enhanced with some gradients.
Source Firkin
A nice one indeed, but I have a feeling we have it already? If you spot a copy, let me know on Twitter.
Source Graphiste
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Everyone needs some stardust. Sprinkle it on your next project.
Source Atle Mo
Prismatic Curved Diamond Pattern 6 No Background
Source GDJ
Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
Prismatic Abstract Background Design No Black
Source GDJ
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
The image depicts a seamless pattern of the design which includes a stylized lotus and a stylized crane.I referred to the original image in a book which is into public domain.
Source Yamachem
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper