A seamless pattern formed from background pattern 102
Source Firkin
Prismatic Curved Diamond Pattern 3 No Background
Source GDJ
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
Prismatic Snowflakes Pattern 3 No Background
Source GDJ
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
From a drawing in 'From Snowdon to the Sea. Striking stories of North and South Wales', Marie Trevelyan, 1895.
Source Firkin
Never out of fashion and so much hotter than the 45º everyone knows, here is a sweet 60º line pattern.
Source Atle Mo
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Coming in at 666x666px, this is an evil big pattern, but nice and soft at the same time.
Source Atle Mo
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
A seamless background pattern with a texture of wood planks. This wood background pattern has vertically arranged planks. You may try to rotate it 90°, to see how it will look like when the wood planks are arranged horizontally.
Source V. Hartikainen
Embossed lines and squares with subtle highlights.
Source Alex Parker
A textured blue background pattern with vertical stripes.
Source V. Hartikainen
A brown seamless wood texture in a form of stripe pattern. The result has turned out pretty well, in my opinion.
Source V. Hartikainen
Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
Remixed from a design on Pixabay. To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
This yellow background consists of a pattern of glossy gold buttons arranged in polka dot style on a seamless texture. Here's a pale yellow background pattern. Feel free to use it for your needs!
Source V. Hartikainen