Chasing a target of 233, Man-of-the-Match Hope scored 110 and Lewis featured in an opening stand of 143, a record-opening stand for the West Indies against Sri Lanka in the West Indies, which was ended when the latter was bowled by an in-swinging yorker from Dushmantha Chameera for 65.
Lewis had faced 90 balls in his 109-minute stay at the crease hitting four fours and two sixes.
Hope, who dropped from the West Indies Test squad last year for loss of form, was a picture of composure, facing 136 balls from which he hit 12 fours and a six in his 10th ODI century before he, too, was bowled by Dushmantha Chameera who finished with 2-50 from his 10 overs.
Hope also shared in a 72-run second-wicket stand with Darren Bravo who hit two fours and a six and in his unbeaten on 37 at the end. With him was Jason Mohammed, who was not out on 13.
Sri Lanka would have been disappointed after winning the toss and opting to take first strike, were given a solid platform of 105.
The partnership was broken two balls into the 20th over by Kieron Pollard, who brilliantly caught Dimuth Karunaratne off his own bowling for 52. He had faced 61 balls and struck four fours in his 89 minutes at the crease.
Eleven balls later it was 112 for 2 when Danushka Gunathilaka, who was going well on 55 when he was controversially given out for obstructing the field, ending his 98-minute stay at the crease during which he struck seven fours from the 61 balls he faced.
The incident seemed to rattle Sri Lanka as two run-outs (Pathum Nissanka and Angelo Matthews) followed that saw Sri Lanka slide to 126 for 4.
Ashen Bandara scored the third half-century of the Sri Lankan innings that provided some stability to the lower order but by then the run rate had fallen before five runs and over and he was without a partner who could successfully take on the West Indies bowling attack.
His was the ninth wicket to fall in the 48th over bowled by Jason Holder for an even 50 that included four fours.
Holder, who also accounted for the wicket of Chameera returned figures of 2-39. Jason Mohammed, who was introduced into the attack late had 2-12 from his four overs having claimed the wickets of Kamindu Mendis and Wanindu Hasaranga de Silva.
There was a wicket each for Alzarri Joseph, Pollard and Fabian Allen, in a performance of which Coach Phil Simmons would be proud.
The decision from Sri Lanka Cricket comes less than six months into the suspension period, and means they are once again eligible for selection in domestic cricket as well as for their national side.
The ban was handed out after the three players were found to have breached COVID-19 bio-bubble protocols during the tour of England last year.
The players were in Durham preparing for the first of three ODIs when they left the team hotel to visit the city centre despite strict COVID-19-related rules.
Batsmen Mendis and Gunathilaka, and wicketkeeper-batsman Dickwella were sent home and hit with strong sanctions.
The executive committee of Sri Lanka Cricket took into account recommendations made by an independent panel of inquiry before handing down a 12-month ban from playing at international level and a six-month domestic suspension.
All three were also fined 10million Sri Lanka Rupees (around £36,000) for their indiscretion.
However, a statement released on Friday outlined that the ban had been lifted, confirming: "Sri Lanka Cricket has decided to lift the one-year suspension imposed on the [three] players from playing international cricket, across all three formats, with immediate effect.
"The latest decision was taken following a request made by the three players to Sri Lanka Cricket to lift the ban imposed on them, pursuant to the conclusion of the LPL 2021. Based on such request, Sri Lanka Cricket obtained a report from the doctor appointed by SLC to provide counselling for the three players during their period of suspension."
Sri Lanka Cricket did also state that if the trio have any further disciplinary breaches in the next two years, the remainder of the suspension will need to be served.
"The lifted suspension will remain suspended for a period of two years, during which the three players' conduct will be closely monitored by the SLC," the release added.
"Accordingly, the three players will be able to engage in playing domestic cricket with immediate effect and will also be available for national selection, subject to complying with mandatory fitness standards."
The three players were in Durham preparing for the first of three one-dayers against England but left the team hotel to visit the city centre against COVID-19-related health guidelines.
A statement from Sri Lanka Cricket on Monday said: "This decision was taken following a preliminary inquiry conducted over a video posted on social media in which the three said players can be seen outside their designated hotel.
"The three players will be suspended from all forms of cricket until the completion of the inquiry."
The trio featured in Sri Lanka's Twenty20 international series against England, which the hosts won with a 3-0 whitewash, and had been expected to be involved in the ODI series.
"The players have been suspended pending a full inquiry, but have confessed to having gone out," Sri Lanka Cricket vice-president Mohan de Silva told Cricinfo.
"They are being recalled [home] from the tour with immediate effect."
Mendis, 26, only made 54 runs in three innings during the T20 series but did top score with 39 in the second T20 in Cardiff while fellow batsmen Gunathilaka, 30, has struggled with knocks of four, three and 19.
Dickwella played the second two matches but the 28-year-old managed just 14 runs with the bat and no catches or stumpings.
The departure of Mendis, Gunathilaka and Dickwella, following an injury to Avishka Fernando has left Sri Lanka has left coach Mickey Arthur with a depleted squad but there are no plans to cancel the series, which starts on Tuesday.
