Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
A seamless pattern formed from miutopia's cakes on a tablecloth.
Source Firkin
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
Used the 6th circle pattern designed by Viscious-Speed to create a print that can be used for card making or scrapbooking. Save as a PDF file for the best printing option.
Source Lovinglf
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Dark wooden pattern, given the subtle treatment. based on texture from Cloaks.
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
Your eyes can trip a bit from looking at this – use it wisely.
Source Michal Chovanec
A seamless pattern formed from a sports car on clker.com. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav
This is a seamless pattern which is derived from a flower petal image.
Source Yamachem
A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
This is the remix of "Background pattern 115" uploaded by "Firkin".Thanks.
Source Yamachem
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
Another fairly simple design drawn in Paint.net and vectorized in Inkscape.
Source Firkin
Pattern formed from simple shapes. Black version.
Source Firkin
Original minus the background
Source Firkin
Prismatic Chevrons Pattern 5 With Background
Source GDJ
Imagine you zoomed in 1000X on some fabric. But then it turned out to be a skeleton!
Source Angelica
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin