Prismatic Abstract Line Art Pattern Background
Source GDJ
A version without colours blended together to give a different look.
Source Firkin
A nice and simple gray stucco material. Great on its own, or as a base for a new pattern.
Source Bartosz Kaszubowski
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
Seamless Prismatic Pythagorean Line Art Pattern No Background. A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
A seamless background pattern with impressed gray dots.
Source V. Hartikainen
This is a remix of "geometrical pattern 01".
Source Yamachem
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
This light yellow background pattern consists of an irregular pattern of spots. Here's a light background pattern with yellowish tint.
Source V. Hartikainen
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
The classic notebook paper with horizontal stripes.
Source Are Sundnes
The original enhanced with one of Inkscapes's filters.
Source Firkin
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ