Hi 
I’m not sure about Gold, at least not off the top of my head anyway 
However we do have information on Auras & Colors as well! It may be a good idea to go through these topics & check out any linked topics or information to the main post or within the replies:
→ 
Weekly Witchy CHALLENGE - Reading Auras
→ 
Weekly Witchy CHALLENGE - The Chakras
→ 
Weekly Witchy CHALLENGE - The Many Colors of Magick
I’ll see if I can find any other topics or information for you & be back in a few 