From the manufacturer:
This StarBrite Color was mixed by James Mullin, one of our StarBrite Pro-Team artist.
"I came up with the Undertone Series because I wanted some colors that matched my illustrative style of art that I love to do.
StarBrite already has vibrant colors but I wanted to use some more muted, and darker tones to contrast the brighter tones.
So I mixed up ten new colors to do just that, Im really happy with the outcome and I hope you are too.
If you love doing bright and colorful tattoos, youll definitely want to add the Undertone Series to your arsenal!"
Gauge Size
The gauge size is the circumference of the smaller bar in the middle.