Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
Actually, there's no clouds in it, but I think it looks quite nice.
Source V. Hartikainen
The image depicts a seamless pattern of pine tree leaves.
Source Yamachem
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
Light gray version of the Binding pattern that looks a bit like fabric.
Source Newbury
Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
A seamless pattern of dark bricks. Maybe it's not very realistic, but it looks good in my opinion.
Source V. Hartikainen
Abstract Stars Geometric Pattern Prismatic No Background
Source GDJ
A bit of scratched up grayness. Always good.
Source Dmitry
Formed from decorative divider 184 in paint.net. Vectorised with Vector Magic.
Source Firkin
No, not the band but the pattern. Simple squares in gray tones, of course.
Source Atle Mo
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
Paper pattern with small dust particles and 45-degree strokes.
Source Atle Mo
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Abstract Tiled Background Extended 10
Source GDJ
This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
Abstract Tiled Background Extended 12
Source GDJ
A textured orange background pattern with vertical stripes.
Source V. Hartikainen
A seamless pattern from a tile made from a jpg on Pixabay. To get the tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
A seamless background colored in pale orange. It has a paper like texture with diagonal grid pattern.
Source V. Hartikainen
Inspired by a drawing seen in 'City of Liverpool', James Picton, 1883.
Source Firkin
A seamless pattern the starting point for which was a 'light rays' rendering in Paint.net.
Source Firkin
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin