As promised here are some comparison swatches for two of the Dior Voyage Transatlantique Manicure Sets in Yacht 210 and Captain 750 (Saks exclusive, limited-edition).
Yacht is a grey-beige-nude blend. It's more beige than Gris Trianon but not quite as grey as Chanel Frenzy. Below are also comparisons to Deborah Lippmann Fashion, Dior Nude Chic (discontinued), YSL Beige Gallery and YSL Beige Leger.
Captain is a classic red. You will most likely find it very similar to other classic reds. It has a bit more warmth than other Diors without being orangey. Captain has no blue. It's a bit brighter and warmer than Dior Trafalgar. Captain also has a jelly finish. Below compared to Dior Calypso (discontinued and more pink), Tom Ford Ginger Fire (more orangey), Chanel Coromandel (deeper and more red), Chanel Enthusiast (pretty close but slightly darker) and Dior Tie & Dye (darker).