An interesting dark spotted pattern at an angle.
Source Hendrik Lammers
Prismatic Geometric Tessellation Pattern 4 No Background
Source GDJ
Utilising a bird from s-light and some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Prismatic Triangular Background Design Mark II 5
Source GDJ
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
More carbon fiber for your collections. This time in white or semi-dark gray.
Source Badhon Ebrahim
Formed from decorative divider 184 in paint.net. Vectorised with Vector Magic.
Source Firkin
A version without colours blended together to give a different look.
Source Firkin
The texture of this background image has some similarities with leather, and it's colored in a dark brown color. So, if you are looking for a dark brown background image for your website, this may be an option for you.
Source V. Hartikainen
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Prismatic Abstract Line Art Pattern Background
Source GDJ
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
A pattern drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
A seamless web texture with illustration of pale color stains on canvas.
Source V. Hartikainen
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
Prismatic Abstract Geometric Background derived from an image on Pixabay.
Source GDJ