Litmus

[Sarah]

A dyestuff extracted from certain lichens (Roccella tinctoria,Lecanora tartarea, etc.), as a blue amorphous mass which consists ofa compound of the alkaline carbonates with certain coloring mattersrelated to orcin and orcein.

[Tanya Shivari]

Web-based email creation, testing, and analytics platform that lets users build, test, troubleshoot, and optimize every campaign. A software product by Litmus Software

[Little_Girl]

A dye obtained from certain lichens that is red under acid conditions and blue under alkaline conditions.