tilegroxy Docs
The image’s extension decides what kind of tile it is. Images ending in .mvt or .pbf are served as Mapbox Vector Tiles and images ending in .mlt as MapLibre Tiles, which also sets the layer’s datatype. Anything else is served as a PNG.
Configuration options
Parameter Description Type Required Default

image

Either a filepath to an image on the local filesystem or one of the built-in images

string

Yes

None

color

A hexcode (RGB or RGBA) of a color to return. Equivalent to specifying image with this value with a prefix of "color:"

string

No

None