Very simple, very blu(e). Subtle and nice.
Source Seb Jachec
Prismatic Isometric Cube Wireframe Pattern No Background
Source GDJ
A lovely light gray pattern with stripes and a dash of noise.
Source V. Hartikainen
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Pattern formed from simple shapes. Black version.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Background pattern originally a PNG drawn in Paint.net
Source Firkin
The image depicts a seamless pattern which was made using stripe-like things including borders.I used OCAL cliparts called "Blue Greek Key With Lines Border" uploaded by "GR8DAN" and "daisy border" uploaded by "johnny_automatic".Thanks.
Source Yamachem
Smooth Polaroid pattern with a light blue tint.
Source Daniel Beaton
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Same as gray sand but lighter. A sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
Spice up your next school project with this icon background.
Source Swetha
From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin
A seamless pattern the starting point for which was a 'light rays' rendering in Paint.net.
Source Firkin
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
Prismatic Triangular Seamless Pattern III With Background
Source GDJ
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso
Prismatic Hexagonalism Pattern No Background
Source GDJ
A version without colours blended together to give a different look.
Source Firkin
It’s an egg, in the form of a pattern. This really is 2012.
Source Paul Phönixweiß
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
With a name like this, it has to be hot. Diagonal lines in light shades.
Source Isaac