Browse to Admin -> Workgroup -> Settings. Tick the [Custom Theme] option. Here you can set the Primary colour for the workgroup using the RGB hex code. You can also select the desired text colour to match your new theme colour.
On the right hand side of the screen there is a sample heading, buttons and dropdown list so that you can check the new colour scheme before saving the settings.
Once you are happy with the colour choices, click [Update Workgroup Settings] to save the colours and apply them to the entire site.
To upload a custom logo, either drag-and-drop an image onto the capture area or click [Choose Files]. Logo images are limited to a maximum of 500KB, and smaller images will load faster. The logo will be displayed at a height of 45px, so we recommend scaling your image before you upload.
Click [Start Uploads] to save the logo as the default for your workgroup.
Once the upload is complete, refresh the page to load the new logo.