Searching for Light Might Hardie Board houses? Ethereal and airy, Light Mist is a cool and soft color update. Light Mist is a fresh gray with just a hint of the sky. Pair Light Mist with other grays for a moodier vibe. Combine blue accents with Light Mist to bring out its brighter side. The classic combination of the Light Mist James Hardie siding color with Arctic White lends a crisp and tidy air to a home’s façade. This refreshing shade of gray is a versatile neutral. Coastal, Modern or Cottage – Light Mist does it all.