You can select the multiple components and edit the properties. To go to the Properties page, select multiple components and right click → Go to Properties option as shown in the following screenshot.
You can select colors for every element of every component in a model in the Dashboard. To set colors, go to Appearance View in the Properties pane.
There are a number of color combinations and you can also define your own color combination.
To add your own color combinations, you can click on more color options and select RGB or HSL. You can also set color at run time based on the user input or to a cell in a spreadsheet. Go to Properties → Appearance.
Go to Color tab and click on Color selector → Bind to a Color as shown in the following screen shot.
Color selection cell changes to bound color icon as shown in the following screenshot.
In a similar way, you can format text elements in a model in the Dashboard.