Possible Clues:

• Natural
• International organisation faded, we hear — that's natural
• Not coloured at all edges -- uneven dainty emerald
• Came to life again, we hear, with natural colour
• Without artificial colouring
• Natural, hairwise
• Staying gray, say
• Still the natural color
• As hair without bleach revived, might you say?
• Half of red wine red? That's not right -- is it white?