Related Clues:

• Slight colour
• Trace (of colour)
• Slight amount of colour
• Slight tint
• Touch (of colour?)
• Slight colouring
• Trace of colour
• Small quantity of (differing) colour
• Just the slightest amount
• Just a trace
• Faint hue
• Trace amount
• Soupçon
• Can retrospective, say, show a bit of colour ?
• Hint of colour