Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
A seamless pattern formed from a modified version of rwwgub's tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This one resembles a black concrete wall when is tiled. It should look great, at least with dark website themes.
Source V. Hartikainen
Sharp but soft triangles in light shades of gray.
Source Pixeden
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
An interesting dark spotted pattern at an angle.
Source Hendrik Lammers
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
A free repetitive background with a dark concrete wall like texture. This one may be used in dark web site designs.
Source V. Hartikainen
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
One more sharp little tile for you. Subtle circles this time.
Source Blunia
A pattern drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
Continuing the geometric trend, here is one more.
Source Mike Warner
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Prismatic Snowflakes Pattern No Background
Source GDJ