The image is a design of blue glass.How about using it as background image?
Source Yamachem
Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
A seamless pattern drawn originally in Paint.net by distorting a slice of background pattern 116 and copying the resulting triangle numerous times.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Prismatic Floral Pattern 3 Variation 3 No Background
Source GDJ
An abstract web texture of a polished blue stone (or does it look more like ice).
Source V. Hartikainen
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
This is a hot one. Small, sharp and unique.
Source GraphicsWall
From a drawing in 'Cassell's Library of English Literature', Henry Morley, 1883.
Source Firkin
From a drawing in 'Codogno e il suo territorio nella cronaca e nella storia'', Gio and Giarella Cairo, 1897.
Source Firkin
A fun-looking elastoplast/band-aid pattern. A hint of orange tone in this one.
Source Josh Green
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
From a drawing in 'Hundert Jahre in Wort und Bild', S. Stefan, 1899.
Source Firkin
Dark wooden pattern, given the subtle treatment. based on texture from Cloaks.
Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat
A seamless pattern of "sewn stripes" colored in light gray.
Source V. Hartikainen
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
Prismatic Polyskelion Pattern No Background
Source GDJ