Evening does not need full illumination.
Blue Hour asks less from a room. Rather than revealing every edge, the stone floor accepts fragments of light: a lamp, the last of the sky, a reflected line beneath a chair.
The palette deepens around this decision. Wool takes the hard edge from the stone. Brass keeps the lamp's glow modest. The result is not dramatic; it is simply a place that knows when the day has had enough.
Dark, matte stone such as slate behaves exactly this way — see the slate floor guide, and the note on keeping the lamp low.
“Leave enough darkness for the light to have company.”