Very simple, very blu(e). Subtle and nice.
Source Seb Jachec
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
Prismatic Groovy Concentric Background 5
Source GDJ
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
An interesting dark spotted pattern at an angle.
Source Hendrik Lammers
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
A free tileable background colored in off-white (antique white) color.
Source V. Hartikainen
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
Never out of fashion and so much hotter than the 45º everyone knows, here is a sweet 60º line pattern.
Source Atle Mo
This one needs to be used in small areas; you can see it repeat.
Source Luca
Everyone needs some stardust. Sprinkle it on your next project.
Source Atle Mo
Derived from an image that was uploaded to Pixabay by TheDigitalArtist
Source Firkin
Sharp pixel pattern, just like the good old days.
Source Paridhi
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
From a drawing in 'Az Osztrák-Magyar Monarchia irásban és képben', 1885.
Source Firkin
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
A seamless pattern the starting point for which was a 'colour modulo' texture in Paint.net.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Used the 6th circle pattern designed by Viscious-Speed to create a print that can be used for card making or scrapbooking. Save as a PDF file for the best printing option.
Source Lovinglf