This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
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
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
Almost like little fish shells, or dragon skin.
Source Graphiste
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
The image is a seamless pattern which is derived from a vine .Consequently, the vine got like dots via vectorization.The original vine is here:jp.pinterest.com/pin/500744052301410188/
Source Yamachem
This background pattern looks like bamboo to me. Feel free to download it for your website (for your blog perhaps?).
Source V. Hartikainen
No idea what Nistri means, but it’s a crisp little pattern nonetheless.
Source Markus Reiter
Derived from an image that was uploaded to Pixabay by pugmom40
Source Firkin
This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
A new take on the black linen pattern. Softer this time.
Source Atle Mo
This background image has seamless texture that resembles a surface of gray stone.
Source V. Hartikainen
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
A seamless pattern with green and yellow diagonal lines on top of a white dotted background.
Source V. Hartikainen
The image depicts a seamless pattern of a fishnet with a plenty of fish.It may be a lucky charm for fishermen.
Source Yamachem
This background pattern contains worn out colorful stripes as a texture.
Source V. Hartikainen
A free light orange brown wallpaper with vertical stripes designed for use as a tiled background on websites. An yet another background pattern with vertical stripes.
Source V. Hartikainen