Black Out Curtains, for Light/Heat

[GypsyDogs]

I have a set for my rear windows that are Dark blue on one side and white on the other. Makes my windows appear black-out from outside and reflects light inside at night- nice when using dim lighting. Or reverse them and they reflect more sunlight back through window during the day…held with magnets sewn into the seams to make it super easy to put up and/or change configuration.
My main cab curtains are slate on the exterior facing side (to look boring) and a subtle sparkle-dove gray on the interior facing side- again for recycling light and generally brightening the living area.