SchemeColour nameFS numberBS numberHumbrolXtraColorVallejo ModelColorVallejo ModelAirHataka
Standard #1Overall Yellow     H154 X213 70.953 71.078 -
 
Standard #2Overall Glossy Dark Sea Blue ANA 623 ~5042   H181 X121 70.898 71.087 ~001

Check www.paint4models.com for an extensive conversion table with lots of colour and paint systems.

Sikorsky_S51
Sikorsky S.51: Delivery scheme: overall yellow.
Sikorsky_S51
Sikorsky S.51: overall yellow.
Sikorsky_S51
Sikorsky S.51: Overall Glossy Sey Sea Blue: ANA 623.