Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
The image depicts meshed silhouettes of various things.The original image is an OCAL clipart called "Enter FOSSASIA 2016 #IoT T-shirt Design Contest" uploaded by "openclipart".Thanks.
Source Yamachem
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
Feel free to download and use it, or see the rest of the dark background patterns that I have made. Anyway, I hope you will find something that you like.
Source V. Hartikainen
Colorful Floral Background 3 No Black
Source GDJ
Prismatic Abstract Line Art Pattern Background
Source GDJ
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
It’s an egg, in the form of a pattern. This really is 2012.
Source Paul Phönixweiß
Your eyes can trip a bit from looking at this – use it wisely.
Source Michal Chovanec
Abstract Tiled Background Extended 8
Source GDJ
Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
A nice one indeed, but I have a feeling we have it already? If you spot a copy, let me know on Twitter.
Source Graphiste
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
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
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin