Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
Prismatic Groovy Concentric Background 5
Source GDJ
A seamless pattern formed from cross 4. To get the original tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
The name Paisley reminds me of an old British servant. That’s just me.
Source Swetha
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Prismatic Abstract Geometric Background 5
Source GDJ
Seamless tile drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Light and tiny, just the way you like it.
Source Rohit Arun Rao
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
Prismatic Hypnotic Pattern No Background
Source GDJ
Colorful Floral Background 3 No Black
Source GDJ
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Prismatic Geometric Pattern Background 2
Source GDJ
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
More bright luxury. This is a bit larger than fancy deboss, and with a bit more noise.
Source Viszt Péter
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin