The image depicts a seamless pattern of a tortoise in tortoiseshell (hexagon).
Source Yamachem
Inspired by a pattern found in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
Seamless Prismatic Geometric Pattern With Background
Source GDJ
Prismatic Groovy Concentric Background 3
Source GDJ
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A seamless background pattern with impressed gray dots.
Source V. Hartikainen
A heavy dark gray base, some subtle noise and a 45-degree grid makes this look like a pattern with a tactile feel to it.
Source Atle Mo
Farmer could be some sort of fabric pattern, with a hint of green.
Source Fabian Schultz
Here's a camo print with more tan and less green, such as might be used in a desert scenario. This is tileable, so it can be used as a wallpaper or background.
Source Eady
A simple example on using clones. You can generate a nice base for a pattern fill quickly with it.
Source Lazur URH
This is the remix of "plant pattern 02".I changed the object color to white and the BG to purple.The image a seamless pattern derived from a weed which I can't identify.The original weed image is from here:jp.pinterest.com/pin/500744052301423641/
Source Yamachem
Remix from a drawing in 'Ostatnie chwile powstania styczniowego', Zygmunt Sulima, 1887.
Source Firkin
Prismatic Abstract Geometric Background derived from an image on Pixabay.
Source GDJ
The first pattern on here using opacity. Try it on a site with a colored background, or even using mixed colors.
Source Nathan Spady
This is the remix of an Openclipart clipart called "Maze" uploaded by "any_ono_mous".Thanks.This is a seamless pattern of a maze.
Source Yamachem
If you’re sick of the fancy 3D, grunge and noisy patterns, take a look at this flat 2D brick wall.
Source Listvetra
To get the tile this is made up from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin