Related Clues:

• Shrub that yields indigo
• Indigo
• Blue dye
• Part of Roy G. Biv
• Indigo dye source
• Indigo plant
• Indigo source
• Dye-yielding plant
• Ellington song mood
• Color of Duke Ellington's 'Mood'
• Rainbow color
• Color in an Ellington title
• Herb yielding a blue dye
• Spectrum member
• Dyeing plant