i suggested ...pandora... in your other post
the mentions of blue and eragon made me think ...saphira... (eragons dragon)
mentions of yellow makes me think sun goddess's so..
..Olwen - celtic goddess of sunshine
..Aditi - a Hindu Goddess from India, keeper of the light that illuminates all life and ensures consciousness
..Akycha - An Alaskan solar Goddess who once lived on earth as a beautiful woman (not sure u wana know the rest of the storey kinda taints the name)
..Amaterasu - Japanese Shinto Goddess, her name means great shinning heaven. She is the head of the Japanese pantheon and her emblem, the rising sun, appears on the Japanese flag.
..Brigid - A Celtic fire Goddess, as a solar deity her attributes are light, inspiration and all skills associated with fire.
in fact here's the sun goddess page i found the names on, there's more
http://www.goddess-guide.com/sun-goddesses.html