The ankh was the hieroglyphic for 'life.' Look for it at the links below.
yellow in ancient Egypt
The Ankh.
before christ
it was zaza
no
The Ankh.
The cobras in Ancient Egypt was a sign of protection.
No, they were obsessed with the after-life.
green
The symbol was the Ankh.
The Nile river. It was the complete source of life for Egypt.
Black, which represented life and vitality.