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  • Block entity data
    • Tags common to all block entities see Template:Nbt inherit/blockentity/template
    •  Color: The color that has been used to dye the sign. The default value is "black". One of "white", "orange", "magenta", "light_blue", "yellow", "lime", "pink", "gray", "light_gray", "cyan", "purple", "blue", "brown", "green", "red", or "black".
    •  Text1: First row of text.
    •  Text2: Second row of text.
    •  Text3: Third row of text.
    •  Text4: Fourth row of text.

The character limit for the Text tags depends on the width of the characters. Although the Text tags are string objects, they should contain JSON text which are evaluated as compound objects.