IF,

Salvia guaranitica 'Black and Blue' has cobalt blue flowers with flower stems and calices that are black hence the name 'Black and Blue'.

S. guaranitica has cobalt blue flowers with green flower stems and calices.

SG

Here is a link that might be useful: Salvia guaranitica 'Black and Blue'

Here's a picture I took last year of a female cloudless sulphur on B&B salvia guaranitica.
Sherry

Here is a link that might be useful: {{gwi:1238426}}