Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
The image depicts polka dot seamless pattern.
Source Yamachem
The image is a design of blue glass.How about using it as background image?
Source Yamachem
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
Actually, there's no clouds in it, but I think it looks quite nice.
Source V. Hartikainen
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
Seamless pattern inspired by a drawing on Pixabay. To get the tile this is formed from, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Prismatic Abstract Background Design No Black
Source GDJ
Here's a subtle marble-like background for use on websites.
Source V. Hartikainen
Prismatic Abstract Line Art Pattern Background
Source GDJ
One more sharp little tile for you. Subtle circles this time.
Source Blunia
This one is super crisp at 2X. Lined paper with some dust and scratches.
Source HQvectors
This one resembles a black concrete wall when is tiled. It should look great, at least with dark website themes.
Source V. Hartikainen
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin