That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
If you want png files of thisu can download them here :
Source Viscious-Speed
A frame using leaves from an image that was uploaded to Pixabay by mayapujiati
Source Firkin
Prismatic Groovy Concentric Background 4 No Black
Source GDJ
Abstract Tiled Background Extended 8
Source GDJ
Prismatic Abstract Geometric Background 2
Source GDJ
You may use it as is, or modify it as you like.
Source V. Hartikainen
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
U.S.-based National Fire Protection Association standard fire diamond for flagging risks posed by hazardous materials. The red diamond has a number 0-4 depending on flammability. The blue diamond has a number 0-4 depending on health hazard. The yellow has a number 0-4 depending on reactivity. the white square has a special notice, e.g OX for oxidizer.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i
Source Firkin