Colour version of the original seamless pattern.
Source Firkin
The image depicts the Japanese Edo pattern called "seigaiha" or "青海波" meaning "blue -sea- wave".I hope it's suitable for the summer season.
Source Yamachem
A repeating background for websites with a texture of black groove stripes.
Source V. Hartikainen
Black brick wall pattern. Brick your site up!
Source Alex Parker
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
Same as gray sand but lighter. A sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Derived from an image that was uploaded to Pixabay by pugmom40
Source Firkin
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
A seamless dark leather-like background texture with diagonal lines that look like stitches.
Source V. Hartikainen
Prismatic Geometric Pattern Background 2
Source GDJ
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight