Prismatic Abstract Background Design No Black
Source GDJ
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
Prismatic Groovy Concentric Background 2
Source GDJ
Prismatic Abstract Geometric Background derived from an image on Pixabay.
Source GDJ
A white version of the very popular linen pattern.
Source Ant Ekşiler
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
Might not be super subtle, but quite original in its form.
Source Alex Smith
Clean and crisp lines all over the place. Wrap it up with this one.
Source Dax Kieran
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
Actually, there's no clouds in it, but I think it looks quite nice.
Source V. Hartikainen
Square design drawn in Paint.net and vectorized in Vector Magic.
Source Firkin