You can select and customise a report theme from your dashboard via customisation>report theme. On clicking the report theme icon you will be taken to a screen which looks like this.
Your account comes preloaded with five themes – Modern Greyscale, Classic B/W, Classic FT, Modern FT and Contempo (which is based on the Genovo colour scheme). You can only apply one theme at any one time and the Contempo theme is selected by default. To apply another theme simply select it as active.
To view the underlying styles of a theme click on the corresponding eye icon for that theme.