Possible Clues:

• The Owl and the Pussycat's boat color
• Writer about to admit it's a beautiful colour for a boat
• Bright colour (of vegetables)
• Flighty female about to settle colour
• Shade (of vegetable?)
• Here writer describes match of a relevant colour
• Shade of the Owl and the Pussycat's boat
• Swan boxes match in colour
• Bright vegetable colour
• Colour of Owl and Pussy-Cat's boat (Lear)