Nairobi® Professional Tru-Colors™ For the stylist who insists upon quality coloring options and treatments for their clients, Nairobi Professional has created Tru Colors, a line of fun and gentle temporary semi-permanent colorings that includes no peroxides or ammonia. With shades ranging from Pure Black #1 to Mari-gold #6, there is something to satisfy everyone, from the conservative to more adventurous client. Use Tru Colors Lightening Powder or the Soft Finish Leave-in Conditioner when needed to get the most out of every look.