Value Access Methods
To access a value of a Node connect the Output Port to a Input Port. Once the connection is established you can use the data either as a parameter to compare to or manipulate the input value (e.g. Mapping Node) or as content in a Phrase Variable which can be used in the text.
Access to the input port with the parameter #param1.
param1 = "black"
Rename the parameter so that you can easily see which values are used where, especially for complex tasks.