Indigo it is not, but Nubar Indigo Illusion is a gorgeous colour all the same. For as long as I've been obsessed with nail varnish, one of my favourite effects has always been duochromes - they appear one colour in some lights, and another colour in others. Nubar is known for its talent for duochromes, and Indigo Illusion is one of the best I have ever seen. It goes from dusty blue to lilac, grey, green, gold... Stunning.