The aircraft has been fitted with its Rolls-Royce Trent XWB engines and the painting process marks one of the final stages before the flight-test regime begins.
Customers have ordered 414 of the -900 variant, the first of the three-member family to be developed.
Having been painted the aircraft will undergo a series of ground tests and be transferred to the flight-test division for ground runs.
The airframer has yet to clarify when the prototype, MSN1, will carry out its first flight.
Airbus has secured orders for 616 A350s including 110 of the largest variant, the -1000, and 92 of the smaller -800.
Airbus has powered up the prototype A350-900's engines for the first time, after starting the auxiliary power unit.
The aircraft is fitted with two Rolls-Royce Trent XWB powerplants.
It follows transfer of the A350-900, MSN1, to the flight-test operation in preparation for the aircraft's maiden flight.
Airbus
Airbus rolled out the jet on 13 May in the airframer's colour scheme. It has yet to indicate when first flight will take place.
There are 616 firm orders for the twinjet including 414 for the -900 version.
Source Flightglobal
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