The South Korean electronics giant is trying to stave off the threat from Apple on its home turf after the Cupertino, California-based firm gained 14 percent smartphone market share in the country in July, tripling from the same time last year, according to Counterpoint Research.
Samsung has been struggling in the smartphone market globally in recent years. Profit from its mobile division plunged to 2.76 trillion South Korean won in its second quarter this year, down over 37 percent year-on-year.
Samsung's pink gold Note 5 will come in a 64 gigabyte version only and cost 965,800 won ($854).
"Clearly offering a pink design to launch alongside the same time as Apple's 6s is clearly a spoiler action and a low effort thing for them to do," Ian Fogg, head of mobile at IHS, told CNBC by phone.
There was no indication that when this would expand beyond South Korea, but Samsung said it was looking to roll it out to other parts of Asia.
"The introduction of new color variations for the Galaxy Note 5 will gradually be expanded to other Asian countries but release details are still being worked out," a spokesperson for the company told CNBC by email.