Used correctly, this could be nice. Used in a bad way, all hell will break loose.
Source Atle Mo
Very simple, very blu(e). Subtle and nice.
Source Seb Jachec
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A seamless paper background texture colored in pale yellow. This seamless texture is ideal for those who need a yellow background image for their website. The texture resembles paper.
Source V. Hartikainen
The image depicts a seamless pattern of a snow crystal.I referred to a book called ”sekka-zusetsu” or "雪華図説" which means an illustrated explanation about snow crystals.This book was published in 1832 (天保3年) or Edo period.For more about "雪華図説",see here:dl.ndl.go.jp/info:ndljp/pid/2536975
Source Yamachem
"Beige Stone", Tileable Texture.
Source V. Hartikainen
This background image has seamless texture that resembles a surface of gray stone.
Source V. Hartikainen
Bumps, highlight and shadows – all good things.
Source Badhon Ebrahim
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
The original enhanced with some gradients.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
A free seamless background texture of "timber wall" (colored in dark brown).
Source V. Hartikainen