Detailed but still subtle and quite original. Lovely gray shades.
Source Kim Ruddock
Tiny little fibers making a soft and sweet look.
Source Badhon Ebrahim
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
With a name this awesome, how can I go wrong?
Source Nikolay Boltachev
A seamless design of flowers remixed from a jpg on Pixabay by Prawny.
Source Firkin
Zero CC tileable wood texture, made by me procedurally in Neo Texture Edit.
Source Sojan Janso
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
The image is a design of blue glass.How about using it as background image?
Source Yamachem
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
This one needs to be used in small areas; you can see it repeat.
Source Luca