Illustrator Scripting :: How To Rename Colour Swatches

In Illustrator Javascript, you can use the following to rename layers:
 
var doc = app.activeDocument;
// loop through all layers
for (var i = 0; i < doc.layers.length; i++) {
 
[Code]....

Is there anyway to rename colour swatches.
 
For example, I have 20 swatches named Yellow -(Keyword). (The keyword is different for each swatch).

I would like to replace yellow with the word colour1 while replacing the -(keyword) part in tact.
 
Is this possible? My swatches are in groups, so I am not sure if it makes it more complicated.