Hay's Russet · Dusky Madder Violet

Two dark colours by firelight, a burnt red and a deep madder violet.

Both lie very low in value at a similar strength, so the pairing is grave and close. One leans warm toward red-brown, the other cool toward violet, and that small turn is the only contrast on offer. Colours held this deep depend on warmth to keep their glow, and here it just survives.