One more sharp little tile for you. Subtle circles this time.
Source Blunia
Zero CC tileable seed texture, edited by me to be seamless from a Pixabay image. CC0
Source Sojan Janso
Prismatic Basic Pattern 2 No Background
Source GDJ
Zero CC tileable hard cover red book, scanned and made by me. CC0
Source Sojan Janso
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Paper pattern with small dust particles and 45-degree strokes.
Source Atle Mo
Prismatic Curved Diamond Pattern 7 No Background
Source GDJ
Zero CC tileable hard cover cells, skin like, book texture. 4K, Scanned and made by me CC0
Source Sojan Janso
Inspired by this, I came up with this pattern. Madness!
Source Atle Mo
This background image has seamless texture that resembles a surface of gray stone.
Source V. Hartikainen
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I. Version with black background.
Source Firkin
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
Prismatic Polka Dots 3 No Background
Source GDJ
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
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
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
Floral patterns might not be the hottest thing right now, but you never know when you need it!
Source Lauren
Prismatic Polka Dots Mark II 2 No Background
Source GDJ
Oh yes, it happened! A pattern in full color.
Source Atle Mo
Colour version of the original pattern inspired by the front cover of 'Old and New Paris', Henry Edwards, 1894.
Source Firkin
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman