From my childhood I recall a comics strip displaying an early morning landscape with a prominently blue sky that stayed in my memory because of its sheer beauty. I have found such deep blue ambience many times whenever I wake up super early.
I recently came to know that there is a word for this time period called Blue hour which technically happens both in mornings and evenings. I like the morning ones better since it's extremely quiet to the point that it feels like a forbidden free time which you can have for yourself without having expectations of any other living creature around you.