Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
Element of beach pattern with background.
Source Rones
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
A new one called white wall, not by me this time.
Source Yuji Honzawa
A seamless pattern recreated from an image on Pixabay. It is reminiscent of parquet flooring and is formed from a square tile, which can be recovered in Inkscape by selecting the ungrouped rectangle and using shift-alt-I together.
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
A seamlessly repeating background pattern of wood. The image is procedurally generated, and, I think, it's turned out quite well.
Source V. Hartikainen
A simple bump filter made upon request at irc #inkscape at freenode. Made a screen capture of the making here: https://youtu.be/TGAWYKVLxQw
Source Lazur URH
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
A comeback for you: the popular Escheresque, now in black.
Source Patten
Zero CC tileable grass texture, photographed and made by me. CC0
Source Sojan Janso
Prismatic Snowflakes Pattern No Background
Source GDJ
Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat
Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Prismatic Groovy Concentric Background No Black
Source GDJ
A seamless pale yellow paper background with a pattern of animal tracks.
Source V. Hartikainen
Original seamless pattern with an Inkscape filter.
Source Firkin
A new take on the black linen pattern. Softer this time.
Source Atle Mo
A seamless pattern the starting point for which was a 'light rays' rendering in Paint.net.
Source Firkin