This could be a hippy vintage wallpaper.
Source Tileable Patterns
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
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
Redrawn based on a drawing in 'По Сѣверо-Западу Россіи' Konstantin Sluchevsky, 1897.
Source Firkin
More Japanese-inspired patterns, Gold Scales this time.
Source Josh Green
This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
Prismatic Abstract Background Design No Black
Source GDJ
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom