Orange-red pattern for tiled backgrounds.
Source V. Hartikainen
Snap! It’s a pattern, and it’s not grayscale! Of course you can always change the color in Photoshop.
Source Atle Mo
These dots are already worn for you, so you don’t have to.
Source Matt McDaniel
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
Prismatic Hypnotic Pattern 2 No Background
Source GDJ
Sometimes you just need the simplest thing.
Source Fabricio
Light gray pattern with an almost wall tile-like appearance.
Source Markus Tinner
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
Pattern Background, Texture, Photoshop Structure style CC0 texture.
Source Darkmoon1968
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
Prismatic Snowflakes Pattern 3 No Background
Source GDJ
CC0 remixed from a drawing. Walter Crane, 1914, Firkin.
Source SliverKnight
You know I’m a sucker for these. Well-crafted paper pattern.
Source Mihaela Hinayon
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
A seamless background colored in pale orange. It has a paper like texture with diagonal grid pattern.
Source V. Hartikainen
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso
A free seamless background with pink spots.
Source V. Hartikainen