★★★★ An unexpected sampling of ways not to be unpleasant. The orbital muscles got ready to tighten and then relaxed, in the gentle light of a damp-aired morning. Mellow gray overtook the sky for a long spell, keeping the streets cool. Then abruptly there was almost-full warm sun. The light was clear; the sidewalks were full. Toward sundown, uptown, the neutral gray had come back again. Was air conditioning dripping, or was rain starting to fall? By the end of a trip through the grocery, in and then out on a wide-open express lane, the gray appeared to be resolving back to blue, in the ambiguous tones of dusk. Either way, the far-away west was streaked with glowing pink.