The Cadillac Celestiq Night Test is a one-off commission with a dark Caspia Tricoat Metallic exterior.

The interior wears Backen Black and Sheer Gray leather, plus carbon-fiber and brushed-metal trim.

The 655-hp Celestiq Night Test will make its public debut at The Quail during Monterey Car Week.

The Cadillac Celestiq is getting a darker personality for Monterey Car Week. Dubbed the Celestiq Night Test, this one-off commission trades the flagship EV's usual bright colors and chrome for a shadowy exterior, dark wheels, and a more understated cabin.

The Night Test is finished in subtle Caspia Tricoat Metallic. Up front, it gets a Jade-finish lighting bezel surrounding the headlights. Cadillac says the dark treatment is designed to diffuse the light rather than reflect it. The look is finished off with 23-inch wheels in a dark finish with Jade accents.