That brief time of the morning - today it is 6:55 a.m. - when the sky turns cobalt. Those brief minutes before any light appears on the horizon. The true herald of dawn is l'heure bleu.
Dark objects are blackest black against that cobalt backdrop. The very air is blue. White objects are tinged with cobalt. My favorite shade of blue.
Even on this rainy morning, the sky is cobalt, the white garage and the water tub in the back yard are blue. And just a few minutes later, gone, as the sky lightens toward dawn.