Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom
Prismatic Groovy Concentric Background
Source GDJ
Oh yes, it happened! A pattern in full color.
Source Atle Mo
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868.
Source Firkin
I love cream! 50x50px and lovely in all the good ways.
Source Thomas Myrman
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
Seamless Prismatic Geometric Pattern With Background
Source GDJ
A seamless pattern the starting point for which was a 'light rays' rendering in Paint.net.
Source Firkin
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
From a drawing in 'Royal Ramsgate', James Simson, 1897.
Source Firkin
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
Everyone loves a diamond, right? Make your site sparkle.
Source AJ Troxell
A pale yellow background pattern with vertical stripes. The stripes are partially faded. I think this background image turned out pretty well, especially those faded stripes.
Source V. Hartikainen
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
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
Prismatic Basic Pattern 2 No Background
Source GDJ
If you’re sick of the fancy 3D, grunge and noisy patterns, take a look at this flat 2D brick wall.
Source Listvetra
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
Prismatic Abstract Geometric Background 5
Source GDJ