How is the representative color of each member of Lan decided?

Xiao Dalan, although he didn't find a hobby of fishing when he teamed up, blue was unexpectedly the same color as the ocean. In addition, blue symbolizes a relatively peaceful and calm atmosphere, which is very consistent with Lida's personality in the early days. In fact, it is still very cute now, except when singing;

Master Hong, Gao Fei who sings rap, has a strong passion in his bones, like fire. In the early days, Xiao Da's leadership was actually a little incompetent, and the young master acted as the vice captain;

Love, and his natural leaves. The feeling that gives people is fresh and energetic, naturally not exciting ~

Two dog is yellow, which matches his belly black. Moreover, he loves to play magic and can play all kinds of musical instruments, much like the French magician in the game. Yellow represents a magician full of wisdom and magic ~

Matsumoto purple, Doumyouji Tsukasa in the original flower man, and Ma Zijun in various scams all have their own aura of kings, and purple gas is the symbol of kings ~

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Inadvertently see your question, this is the first time I have answered it for so many years, which is purely fate ~