Frank Ford asked about all the Blue colors Mr. Carder used.

Scott Hansen & Marshall point out the answer is in Paul V. Gardner’s essential book for the Carder collector, The Glass of Frederick Carder . (This book has been republished and is widely available as a Schiffer Classic Reference Book.)

Marshall Ketchum details
The list of colors starting on page 59 of Gardner is reasonably complete. The blue colors listed are, Antique Rita Blue, Calcite Blue, Celeste Blue, Cobalt Blue, Dark Jade Blue, Dark Turquoise Blue, Extra Dark Blue, Flemish Blue, Hard Flemish Blue, French Blue, Light Jade Blue, Light Turquoise Blue, Peacock Blue, Persian Blue, Rita Blue, Rose Blue, Tiffany Blue and Vigilite Blue. Note that although they are listed separately there is some evidence that Rita Blue and French Blue are the same color. Celeste Blue and Persian Blue appear to be very similar in color but react to u.v. light differently. Also, Persian Blue seems to always be found with Bristol Yellow reeding. Many of these colors we have no real knowledge of what they look like. There is also a color that collectors now call Blue-gray (Dimitroff Fig. 10.89) that is often found used with Amber that isn’t a factory name. It is probably one of the colors listed above but we just don’t know which one.

Rande Bly also responds to Frank Ford
These are the Blues I have seen from memory; maybe I have left one out?

Jades
Light Blue Jade
Medium Blue Jade
Dark Blue Jade

Blue Aurene
Blue at base of Tyrian
Tiffany Blue
Blue Calcite (pulled feather)

Blue Moss Agate
Blue Cintra
Blue Cluthra

Transparent Colored Crystals from light to dark
Orchid (really Lavender)
Rose Blue
*Marina Blue
Celeste Blue
French Blue
*Persian Blue
Blue Gray
Flemish Blue
Vigilite Blue (3shades darker than Flemish)
Dark Flemish Blue(10 shades darker than Flemish) used in Blue Aurene