All temples are sacred - the correspond to our churches.
Hephaestus' color is scarlet (redish orange), the color of the fire he uses.
blue eyes
blue and brown
Prometheus stole the flame of Hephaestus and Athena from Olympus. Zeus took action on their behalf.
The sacred animal of the god of forges and fire (Hephatus) in greek mythology is known as donkey, but really, no one knows.
There is no information in mythology or literature suggesting that Hephaestus has a favorite color.
There wasn't a specific city that was favored by Hephaestus over others. Because of the nature of the deity, his gifts were really meant for all mankind, but he was viewed as being inferior, in many ways, to the other gods. Since there were smiths in most cities, there were temples or shrines to Hephaestus in most cities as well.
Most often it is dark, how dark depends on the artistic or writers rendering.
No one specific color is ''sacred'', however the color most often associated with Muslims is green, because the Ottomans, who used it in their flag, were primarily Muslim.
The sacred golden cow
it means hes a hard working craftsman. he created armor, jewels, ect.. for the titans and other gods, though he was lame they accepted him for that.