Why? It might have turned orange like Zee Telugu. But many channels are launched secretly. Star Maa HD is a good example. Tata Sky quietly added Maa HD without any sort of notification from Star's end.
I don't understand Zee's logic behind assigning colors to logos. They could have made everything same colour, but they did something to differentiate. And this criteria for differentiation is completely unknown.
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Orange: Zee Hindi, Zee Tamil, Zee Telugu, Zee ETC, Zee Cafe, Zee Talkies, Zee Talkies, Zee Bangla Cinema, Zee 24 Taas, Zee Kalinga News, Zee Bihar-Jarkhand, Zee Rajasthan, Zee MP-CG, Zee UP-UK
Pink: Zee Kannada, Zee Anmol, Zee Anmol Cinema, Zee Ganga
Red: Zee News, Zee Action, Zee Bangla, Zee Sarthak, Zee 24 Ghanta, Zee Keralam (as per Trademark)
Blue: Zee 24 Kalak, Zee Punjab-Himachal-Haryana
Green: Zee Cinema, Zee Cinemalu, Zee Salam, Zee Malayalam (as per Trademark)
Yellow: Zee Magic
Yellow+Orange: Zee Marathi
Yellow+Orange+Pink: Zee Yuva
Orange+Green: Zee Hindustan
Gold: Zee Business, Zee Bollywood