Why SG Xayah and Neeko have 2 colors rather than 1? Also why their old team colors are wrong? Theory

So all previous SG skins we know have 1 main color. Lux is pink, Syndra purple, Poppy blue etc so why Xayah (pink-green) and Neeko (green-orange) have 2 colors?

I can somehow understand Xayah, because Rakan is green so she can share some colors with him. But why doesn't Rakan have any pink then? Maybe Xayah form we see isn't her original form? Maybe it's a mix or her and Rakan's powers after he tried to heal her with his crystal? Maybe she was pink oryginally? But then there is Neeko... Why is she multicolored too? Don't tell me it's just because she's Neeko, the colorful chameleon...

And looking at their old team: Ahri, Miss Fortune, Neeko, Xayah and Rakan we can see that they didn't match the color sheme we know. So far both teams had pink/peach as leader (Lux and Ahri), red (Jinx and MF), blue (Poppy and Ezreal), green (Lulu and Soraka) and purple (Janna and Syndra). And that color sheme doesn't fit Ahri's old team. There would be 2 pink characters: Ahri and Xayah, no blue, green Rakan and semi green Neeko. So either Riot didn't think this through or there is some lore behind it. And I belive Riot wouldn't do such mistake here ismy theory: Ahri wasn't the leader then. Xayah was, that's why she was full pink. Ahri had different color back then but changed to pink after forming a new team and becoming a leader. What do you guys think?