Each one of us creates our wings, I make them colorful so that my life never lacks joy. The birds are free and appreciate every moment, they do not have grudges, ties, hate, just fly and enjoy the air, enjoy the cold blue sky.
I know that blue is a cold tone, but it represents the Vishuddhi chakra, which is in charge of communication, that is why the sky is blue, because it manages to communicate, to get in touch with everyone on the planet. The dear blue sky @velimir is the same for both, although I am in Colombia :)