Red Bull unleashed a special-edition livery with the revamped paint job featuring substantially more red, but it is understood the former world champions will revert to their normal colours in time for the season-opening race in Melbourne on March 17.
Red Bull have unveiled their first Honda-powered Formula 1 auto, with Max Verstappen driving the initial laps at Silverstone.
"I am very excited to get started as the off-season has been quite long", said Verstappen, 21.
Red Bull have conceded that Honda have been tirelessly working through the winter and the 2019 vehicle could maybe bridge the gap between Red Bull and the top 2 teams.
After five years without championship success, Red Bull is switching from Renault power to Honda this year.
The RB15 will run for the first time at British Grand Prix venue Silverstone today (Wednesday) as part of a filming day.
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Verstappen will get the first proper taste of his new Red Bull during next week's first pre-season test at Barcelona's Circuit de Catalunya. "And from there onwards, you just start to work together with the auto [to see] what you can improve".
"With Honda, we're expecting a lot, we're all very positive but I think it also needs to take a little bit of time, it can not be from race one it will be flawless". We've obviously been able to strike at venues that have suited the characteristics of our vehicle, winning four races last year - should have been five - and three races the year before.
"At the moment I am of course very optimistic, but also realistic".
"What is very important is the team and Honda are pushing really hard to improve the development. Time will tell how we're going to perform".
"Formula 1 is the pinnacle of motorsport".
What do you make of the new Red Bull challenger and do you think Honda will help them scale new heights this season?