Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
This seamless web background texture looks like gray stone. It's great for using as a background image on web pages, or on some of their elements. Anyway, I hope you will find use for it.
Source V. Hartikainen
A background pattern with a look of rough fabric.
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A slightly grainy paper pattern with small horizontal and vertical strokes.
Source Atle Mo
Remixed from a JPG that was uploaded to Pixabay by theasad121
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Retro Circles Background 7 No Black
Source GDJ
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Actually, there's no clouds in it, but I think it looks quite nice.
Source V. Hartikainen
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
A heavy hitter at 400x400px, but lovely still.
Source Breezi
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
Zero CC tileable hard cover cells, skin like, book texture. 4K, Scanned and made by me CC0
Source Sojan Janso
This was formed by distorting an image of a background on Pixabay.
Source Firkin
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
Alternative colour scheme for the original floral pattern.
Source Firkin
Same classic 45-degree pattern, dark version.
Source Luke McDonald
Prismatic Triangular Background Design Mark II 5
Source GDJ
Black brick wall pattern. Brick your site up!
Source Alex Parker