Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom
Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
Seamless pattern the basic tile for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
Used a cherry by doctormo to make this seamless pattern
Source Firkin
One more updated pattern. Not really carbon fiber, but it’s the most popular pattern, so I’ll give you an extra choice.
Source Atle Mo
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Adapted from an image that was uploaded to Pixabay by Anerma.
Source Firkin
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
Prismatic Groovy Concentric Background 4 No Black
Source GDJ
A set of paper filters. The base texture is generated the same way, only the compositing mode is varied.
Source Lazur URH
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
From a drawing in 'Friend or Fortune? The story of a strange year', Robert Overton, 1897.
Source Firkin
One more sharp little tile for you. Subtle circles this time.
Source Blunia
Fake or not, it’s quite luxurious.
Source Factorio.us Collective
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Remixed from a design on Pixabay. To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.
Source Firkin