Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Prismatic Groovy Concentric Background No Black
Source GDJ
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
These dots are already worn for you, so you don’t have to.
Source Matt McDaniel
A seamless stone-like background for blogs or any other type of websites.
Source V. Hartikainen
Lovely pattern with splattered vintage speckles.
Source David Pomfret
Abstract Tiled Background Extended 8
Source GDJ
Prismatic Geometric Pattern Background No Black
Source GDJ
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
Remixed from a drawing in 'The March of Loyalty', Letitia MacClintock, 1884.
Source Firkin
More Japanese-inspired patterns, Gold Scales this time.
Source Josh Green
Prismatic Hypnotic Pattern 2 No Background
Source GDJ
One more brick pattern. A bit more depth to this one.
Source Benjamin Ward
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Colour version of the original pattern.
Source Firkin
You guessed it – looks a bit like cloth.
Source Peax Webdesign
The file was named striped lens, but hey – Translucent Fibres works too.
Source Angelica
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
A seamless pattern with a unit cell drawn as a bitmap in Paint.net and vectorized in Vector Magic.
Source Firkin