Hi SnoWs,
Beautiful modeling! I thought I would look up something from my old library to maybe help you with the royalty stuff. This info comes from a really awesome book, titled “Heraldry: Sources, Symbols, and Meaning” by Ottfried Neubecker, McGraw-Hill Book Co. (UK).
There is a reason for all of the colors in (and on) all of the crowns, shields, armor, and flags of Europe (and even our own flag colors). The aspect and choice of colors for flags also stems from Heraldry. My hope in doing this, is to inspire you with ideas for the symbology in your scene. This info has helped me to balance the symbolism of colors for planetary flags and apparel of the characters in my own stories and concepts. May it do the same for you.
Keep up the awesome work.
Gold= Yellow = OR
Planet: Sun
Precious Stone: Topaz
Symbol of: Understanding, respect, virtue, majesty.
Silver= White = Argent
Planet: Moon
Precious stone: Pearls
Symbol of: Cleanliness, wisdom, innocence, chastity, joy
Red = Gules
Planet: Mars
Precious stone: Ruby
Symbol of: Eagerness to serve one’s fatherland.
Blue = Azure
Planet: Jupiter
Precious stone: Sapphire
Symbol of: Fidelity, steadfastness.
Black = Sable
Planet: Saturn
Precious stone: Diamond.
Symbol of: Mourning.
Green = Vert
Planet: Venus
Precious stone: Emerald.
Symbol of: Freedom, beauty, joy, health, hope.
Purple = Purpure
Planet: Mercury
Precious stone: Amethhyst.
Symbol of: Majesty.
Orange
No planet sign.
No precious stone.
Symbolism: Indefinite.
Brown = Tenne’
Interior of planet, dragon’s head.
Precious stone: Hyacinth.
Symbol of: Nature.
-DM