What are the colors of the papal flag?

yellow and white, with a coat of arms
The coat of arms consists of a blazon and external ornaments:
- the blazon contains following colors:
gold (yellow), red, brown, black, white (eye)
- the external ornaments contains following colors:
gold (yellow), red, black, silver, white


1) Vatican City uses at the moment following three flags:
- National flag and State flag (National flag and civil ensign): "Two fields divided vertically, yellow field on the staff side and a white field on the other side, which bears the tiara and the keys"
http://en.wikipedia.org/wiki/Image:Flag_of_the_Vatican_City.svg

- Papal flags (Papal pennant): "With a yellow band at the hoist and Pope Benedict's personal arms in color in the white fly."
http://en.wikipedia.org/wiki/Image:Papal_pennant.JPG

- Military flag (Swiss Guard): "Papal guard flag of 1914, but with Benedict XVI's arms."

Source:
List of flags of the Papacy
http://en.wikipedia.org/wiki/List_of_flags_of_the_Papacy

Further information:
http://en.wikipedia.org/wiki/Flag_of_the_Vatican_City


2) "The coat of arms of Pope Benedict XVI was designed by then Archbishop Andrea Cordero Lanza di Montezemolo (who later was created a Cardinal) soon after the papal election. The coat of arms consists of a shield and external ornaments."

"The blazon (the written description, in terminology peculiar to heraldry, of the contents of the coat of arms) given on the Vatican website is as follows:

Gules, chapé in or, with the scallop shell of the second; the dexter chape with a moor's head in natural colour, crowned and collared of the first, the sinister chape a bear trippant in natural colour, carrying a pack gules belted sable.
This means, in non-technical English:

A red shield mantled in gold and with a gold scallop shell; the right (for the bearer of the shield, the left for the viewer) part of the mantle has a moor's head in its natural colour (brown) wearing a red crown and red collar; the left part of the mantle has a walking bear in its natural colour (brown) carrying a red pack tied with black bands. "
Source and further information:
Coat of arms of Pope Benedict XVI:
http://en.wikipedia.org/wiki/Coat_of_arms_of_Pope_Benedict_XVI