Thunder — Thunder captures the intensity of a thunderstorm. The deep, dusky color of dry earth just before a storm or aged mahogany wood. This color belongs to the Black, Violet, and Brown families. Its low, close RGB values, with a subtle dominance of red and blue, create a deep, charcoal-gray tint with a hint of warm, dusky violet-brown. also commonly known as Deep Taupe. Nearest neighbors are DimGray, SlateGray, and DarkGray.