The house, which is now a museum in Haworth, West Yorkshire, reopens after a refurbishment on Friday.
"It's closer than it's ever looked to how it would have done in the Bronte period," said Bronte Parsonage Museum collections manager Ann Dinsdale.
"Charlotte put her stamp on the house, and there's quite a lot of colour."
Researchers from the University of Lincoln examined sections of the walls, and in some places found 18 layers of paint and wallpaper dating back to the sisters' habitation in the mid-19th Century.
Source: BBC History
"They came up with the strata, all the layers of paints that had been used over the years in the parsonage and they were able to work out which was the Bronte period," Mrs Dinsdale said.
"All the historic rooms, which are part of the original parsonage, have been completely redecorated."
Charlotte, Emily and Anne Bronte lived with their father and brother in the parsonage. Enduring literary masterpieces written there include Charlotte's Jane Eyre and Emily's Wuthering Heights.
The sisters are particularly remembered for their depictions of the surrounding bleak landscape and their characters' emotional turmoil.
"I think people are possibly going to be quite surprised when they visit the parsonage," Mrs Dinsdale added.
"People have this image of [it] being quite austere with white and grey walls. Actually, it's very clear that they did experiment with colour."

She will address 120 chief executives at Irish business organisation Ibec and is expected to emphasise that "Scotland is open for business".
Ms Sturgeon will also visit the Scottish government's investment and innovation hub in the city.
She said she wanted to strengthen Scotland's Irish links "even further".
"Scottish exports to Ireland are worth Â£1.125bn and Irish investment into Scotland currently supports more than 6,000 jobs," she said.
"It's important to get across to our European partners, such as Ireland, that Scotland voted overwhelmingly to remain in the EU and that we are doing everything we can to protect our relationship with Europe.
"I want companies in Ireland to know that Scotland remains open for business and will continue to be an attractive place to invest.
"I will be asking the delegates at Ibec to work with the hub and to come to Scotland to see what we have to offer.
"A number of new Scottish investment wins have been landed this year and through the strong network the hub continues to develop with Irish-based investors - further projects are in the pipeline."
Ms Sturgeon said "Ireland has always been and will continue to be a key economic partner for Scotland".
"It is even more important than ever that our two countries work together for the benefit of both our nations," she said.
On Friday, Ms Sturgeon told a summit of the British-Irish Council that remaining in the single market was the UK's "least worst" Brexit option.
She said staying inside the common market after leaving the EU would be best for every part of the UK.
The former home of the Bronte sisters has been returned to the design of the authors' era after researchers found fragments of its original decor.
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Scotland's First Minister Nicola Sturgeon is due to visit Dublin on Monday to meet business leaders and discuss investment plans.