Possible Clues:

• Colour but comply when committed to prison
• Colour of Owl and Pussy-Cat's boat
• The colour of podded vegetables and the Owl and the Pussycat's boat
• Concur with writer about colour of Lear's boat
• Colour of Owl and Pussycat's boat (Lear)
• Colour used by Lear to write about match
• Colored like the boat in Edward Lear's 'The Owl and the Pussycat'
• Writer is about to approve a colour
• Hue named for a vegetable
• Colour of the Owl and the Pussy-Cat's boat