This year's Eurovision Song Contest in Liverpool will have the slogan "United by Music", with its artwork showing hearts beating together.
The BBC said it "reflects the very origins of the contest", which was originally created as a broadcasting experiment to bring Europe together.
This year's event will be held in the UK because it is too dangerous to stage it in Ukraine, which won in 2022.
Both country's flags have been used as inspiration for the colour scheme.
An official handover ceremony, hosted by Rylan Clark and AJ Odudu, will be broadcast from Liverpool's St George's Hall at 19:00 GMT on Tuesday on BBC Two.
Most participating countries will also find out which semi-final they will compete in. Local school pupils, as well as members of the Ukrainian community who have settled in Liverpool since the war began, will be involved in the allocation draw.
The semi-finals on 9 and 11 May will see 31 competitors whittled down to 20 acts by the public - in a change to the rules - ahead of the grand final on 13 May.
The UK, France, Spain, Germany and Italy automatically qualify for the final because of how much their broadcasters pay to take part. Ukraine will also go straight to the final as 2022 winners.