The Blues or Livers is an old school Brit strain from Liverpool or Mr. Livers or some such.
To me it's a skunky or Sour blueberry type effect. I wasn't impressed but a lot of people love it and it's crosses. Figures into some folks main meds as a fact.
The Mephisto strains that say Blue or Blues have the old version of the Blues, the ones that say Livers have the new improved (?) version. So you may see Deep Blue C or others brought back as a new strain if Mephisto reworks them with the Livers I think,