The rainbow-coloured logo is on the party's website and will be used in marketing material connected to the event.
The conference will be supported by a party that will be held in Canal Street, Manchester on 6 October.
The Tories ditched its torch logo in favour of an oak tree in 2006. Anna-Maren Ashford, the party's head of brand communications, said 'The tree is rooted and strong, a very British image, yet reflects growth, freedom and versatility.'
This article was first published on marketingmagazine.co.uk