Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Prismatic Geometric Pattern Background
Source GDJ
Remix from a drawing in 'Ostatnie chwile powstania styczniowego', Zygmunt Sulima, 1887.
Source Firkin
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Prismatic Chevrons Pattern 5 With Background
Source GDJ
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
Formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A pattern formed from a squared tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
Can never have too many knitting patterns, especially as nice as this.
Source Victoria Spahn
No, not the band but the pattern. Simple squares in gray tones, of course.
Source Atle Mo
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Alternative colour scheme.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin