The 2015 car began private testing at Porsche's Weissach test track with Lieb in December 2014. Drivers further tested it at UAE's Yas Marina Circuit, the Bahrain International Circuit and Spain's Ciudad del Motor de Aragón from January to March. The first pictures of the car were published online on 16 January, and it was officially revealed to the press at Circuit Paul Ricard's official two-day pre-season test session on 26 March. Porsche used three liveries for the 24 Hours of Le Mans. The No. 17 car was adorned in red as a tribute to Porsche's first overall victory at Le Mans with the Porsche 917 in 1970. The No. 18 entry was liveried in black to showcase the close technical similarities between the 919 Hybrid and the 918 Spyder. The No. 19 vehicle was adorned in white, Germany and Porsche's national standard colour.