The name tells you it has curves. Oh yes, it does!
Source Peter Chon
Remixed from a drawing in 'Some account of the Worshipful Company of Ironmongers', John Nicholl, 1866.
Source Firkin
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
A seamless textured paper for backgrounds. Colored in pale orange hues.
Source V. Hartikainen
A beautiful dark padded pattern, like an old classic sofa.
Source Chris Baldie
Prismatic Abstract Background Design No Black
Source GDJ
If you need a green background for your blog/website, try this one. Remember that Green Striped Background is seamlessly tileable.
Source V. Hartikainen
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
The image depicts a seamless pattern of a tortoise in tortoiseshell (hexagon).
Source Yamachem
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
Prismatic Polka Dots Mark II No Background
Source GDJ
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
Prismatic Abstract Line Art Pattern Background 2
Source GDJ
White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
From a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
Source Firkin