This is the best for reddish or orange eyebrows. If the red is very dark, try using Irish Moss to neutralize before applying new color. Lime Aid can also be used to cool down any light-medium eyebrow color. If Lime Aid is mixed with a dark brown, it will cool and lighten it at the same time. To cool a dark brown without lightening it, mix in a little Irish Moss or Jade Granite instead.