Will Horizon 2020 have a logo and/or a visual identity which is easy to reproduce?

No, there isn't any logo for Horizon 2020 and there will not be one.

In line with the European Commission's policy on corporate visual identity, Horizon 2020 will be promoted as a verbal brand, meaning no "visual mark" or logotype.

When Horizon 2020 is promoted by beneficiaries and other third parties, the EU emblem (flag) can be used in conjunction with the words "Horizon 2020".