Color
When you click the column Color, the dialog Colors opens.
Here you can choose a color by clicking one of the hexagons.
You can also click the button Select... and choose a color you can see on your screen. For example, you could open a logo next to the ContentExplorer, then click the Select-Tool and select the main color of the logo. The color will be shown in the dialog Colors and can be confirmed with the button OK.
Another possibility is to go to the tab Custom and type in the exact color data, either in hue mode or in RGB mode. You can type in numbers ranging from 0 to 255.