Geometric triangles seem to be quite hot these days.
Source Pixeden
Dark blue concrete wall with some small dust spots.
Source Atle Mo
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
Seamless Light Background Texture.
Source V. Hartikainen
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
Prismatic Rounded Squares Grid 4 No Background
Source GDJ
Classic vertical lines, in all its subtlety.
Source Cody L
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
So tiny, just 7 by 7 pixels – but still so sexy. Ah yes.
Source Dmitriy Prodchenko
Prismatic Geometric Pattern Background
Source GDJ
Remixed from a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Retro Circles Background 5 No Black
Source GDJ
Derived from a corner decoration itself found as a jpg on Pixabay.
Source Firkin