Orange-red pattern for tiled backgrounds.
Source V. Hartikainen
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
Prismatic Curved Diamond Pattern 6 No Background
Source GDJ
Abstract Tiled Background Extended 11
Source GDJ
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
Prismatic Curved Diamond Pattern 7 No Background
Source GDJ
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
Light gray version of the Binding pattern that looks a bit like fabric.
Source Newbury
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
Psychedelic Geometric Background No Black
Source GDJ
This is the remix of "Tileable Wave Pattern 2" uploaded by "Arvin61r58".Thanks.I added a wire-mesh fence seamless pattern as a lower layer.
Source Yamachem
Subtle scratches on a light gray background.
Source Andrey Ovcharov
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
From a design in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin
Actually remixed from a pattern on Pixabay. But then noticed a very similar one on Openclipart.org uploaded by btj51q2.
Source Firkin
Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
Black And White Floral Pattern Background from PDP.
Source GDJ
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
Zero CC tileable ground cracked, crackled, texture, made by me.
Source Sojan Janso
Number 2 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos