Possible Clues:

• Ebony man draws in loose belt
• Very darkest colour
• Up in the skies, birds initially have insufficient sense of complete darkness
• Airliner boycott is not bright at all
• Fountain pen left in rear - it's a very dark colour
• Dark as dark can be
• Very dark stream, second to circle lake
• Aircraft's dark shade
• Fly home over lake the colour of coal
• *Coal color