As for the lighting, as typical of traditional interiors, it feels like it was lit by candles, which makes the colors even more vivid.
Here are more examples of red rooms. Enjoy!
Photo 1 photography by Derry Moore
Photo 2 designer Jacques Garcia, photography by Jean- Francois Jaussaud
Photo 3 designer Gérard Trémolet, photography by René Stoeltie
Photo 4 designer Mark Hampton, photography Peter Vitale