Possible Clues:

• Cowardly …
• Oy! Well, that makes it just a shade cowardly
• Colour of lemons and sunflowers
• The yoke, say, of a rainbow
• Just a shade of a craven cry of pain
• There's not a shade of bravery to cry out like this
• Sunny colour
• Its craven to cry out in pain like this
• 'Caution' colour
• Colour of sunflowers and ripe lemons