Think way back to elementary school. If you were fortunate enough that you mother bought the mega-pack of crayons (the one with the built in sharpener), you may recall the colour periwinkle. It was my favourite.
The glowing-blue snow in the just-barely-there sunlight of early winter mornings is periwinkle.
I am not a morning person but there are elements of the early hours that touch my soul: sunrises over the prairies, glowing snow, the chatter of birds and the stillness of the world before all awaken.