Using the front-end, you only can set the color and the icon for one variable by each device.
However, if you want to set the icon and the color for more than one variable for each device, you can send the information by metadata, for example:
"value": "TagoIO Headquarters",
IMPORTANT: You can’t set the color information of pins if you use the device’s quick map. You need to send a metadata property, and you can’t send that through the quick map.
If you choose to use the metadata to send the pin configuration you will need to change the map configuration to get the information by the metadata from the variable:
TIP: you can send the color using hexadecimal instead of the string.