Actually, there's no clouds in it, but I think it looks quite nice.
Source V. Hartikainen
A repeating background of thick textured paper. Actually, it turned out to look like something between a paper and fabric.
Source V. Hartikainen
Paper pattern with small dust particles and 45-degree strokes.
Source Atle Mo
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Here's a dark background pattern that contains a steel grid pattern as a texture. Use it as a website background or for other purposes. It's free!
Source V. Hartikainen
Inspired by an image that was uploaded to Pixabay by geralt
Source Firkin
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin
The original enhanced with one of Inkscapes's filters.
Source Firkin
Detailed but still subtle and quite original. Lovely gray shades.
Source Kim Ruddock
Prismatic Hypnotic Pattern No Background
Source GDJ
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
Spice up your next school project with this icon background.
Source Swetha
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
Black And White Floral Pattern Background Inverse
Source GDJ
Zero CC tileable seed texture, edited by me to be seamless from a Pixabay image. CC0
Source Sojan Janso
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
Colourful background achieved with gradient fills.
Source Firkin
Prismatic Groovy Concentric Background 3
Source GDJ
One more sharp little tile for you. Subtle circles this time.
Source Blunia
From a drawing in 'Az Osztrák-Magyar Monarchia irásban és képben', 1885.
Source Firkin
Prismatic Groovy Concentric Background 2 No Black
Source GDJ