Caspian is a bright, intense and transparent teal just in the middle of blue and green.
PB15 Phthalo blue, PG7 Phthalo green
 
These photos have been edited to best show the accurate colour but please keep in mind that colours are shown differently on different screens.
 
The full range of Julia's paints are available in half and full pans at Julia's Etsy store. If you live within the EU, please go to Etsy for the best shipping price and delivery times: https://www.etsy.com/uk/shop/JuliaKArtStudio