Related Clues:

• Dull and uninteresting
• Dull-colored, or just plain dull
• Olive shade
• Resend a bill
• Not so colorful
• Ask payment
• Demand payment from
• Hound over a debt
• Void of any va-va-voom
• Demand repeatedly
• Meh
• Not bright at all
• Colourless
• Far from ornate
• Far from gaudy