Related Clues:

• Neutral shade
• Smokestack emission
• Light hair color
• Volcanic dust
• Unhealthy air
• It's hard to see through
• Hibachi residue
• Silvery gray
• It may be cast in a flick?
• Urban problem
• Shade of gray
• Pinatubo product
• Silvery-gray
• Barbecue residue
• It may be gone in a flick