Anyway the color ref is pokémon type preference in relation to half-troll blood color/caste, half-trolls being the in-universe label for pokémon-troll hybrids. This doesn't mean all half-trolls are going to follow this leaning though given the nature of pokémon egg groups but it does set down the basic ideas~
Burgundy Blood -- Ghost, Psychic, & Fire Types
Bronze Blood -- Flying, Fairy, & Normal Types
Gold Blood -- Psychic, Electric, & Dark Types
Lime Blood -- Fire, Steel, & Fighting Types
Olive Blood -- Normal, Grass, & Rock Types
Jade Blood -- Grass, Ground, & Bug Types
Teal Blood -- Rock, Dragon, & Flying Types
Cerulean Blood -- Bug, Ice, & Poison Types
Indigo Blood -- Fighting, Steel, & Ground Types
Purple Blood -- Poison, Ghost, & Dark Types
Violet Blood -- Ice, Electric, & Water Types
Fuchsia Blood -- Water, Dragon, & Fairy Types
Bronze Blood -- Flying, Fairy, & Normal Types
Gold Blood -- Psychic, Electric, & Dark Types
Lime Blood -- Fire, Steel, & Fighting Types
Olive Blood -- Normal, Grass, & Rock Types
Jade Blood -- Grass, Ground, & Bug Types
Teal Blood -- Rock, Dragon, & Flying Types
Cerulean Blood -- Bug, Ice, & Poison Types
Indigo Blood -- Fighting, Steel, & Ground Types
Purple Blood -- Poison, Ghost, & Dark Types
Violet Blood -- Ice, Electric, & Water Types
Fuchsia Blood -- Water, Dragon, & Fairy Types



