What it is about blue

Last night reading in bed with Satie gnossiennes - 1. lent playing I glanced up at the window opposite. It was the blue hour and through the curved top sash window the sky was deep blue and glossy; blue glass. Both the music and this blue glass each individually take me to a space of contemplation, together more so. A portal opens. I think of those Rothko paintings that though muted somehow form a pulsating portal through which we might almost step through. Almost; the transcendent remaining somehow visible and yet remote. No, this blue glass forms a frame through which it seems I've already passed; somehow although it remains 'out there' on the other side of the room, I am already through. The sky beyond though not visible as such is much deeper than the distance to the window and I am somehow there; through the window. And there is the sensation of BLUE. No other colour has this energy.