Possible Clues:

• Fearful - colour
• It's a shade cowardly to cry out in pain like this
• The flag of fever
• It's not at all brave to cry out with pain like this
• Colour of the fever flag
• How craven to cry out in pain like this!
• Shortest light
• Colour of Malvolio's stockings (T. Night)
• All looks it to the jaundiced eye
• Gutless