ExtendScript Illustrator - Change color of text one character at a time.

here is a quick script i put together tested in CC2014.

cycles through swatches applying each one to the next letter.

var doc = app.activeDocument
var charCount = doc.textFrames[0].textRange.characters.length;
var colorIndex=3;
for(i=0; i<charCount; i++, size *= 1.2) {
    colorIndex++;
    if (colorIndex == app.activeDocument.swatches.length){colorIndex = 3;}
    doc.textFrames[0].textRange.characters.characterAttributes.fillColor = doc.swatches[colorIndex].color;

}

see page 20 of the javascript guide.

http://wwwimages.adobe.com/content/dam/Adobe/en/devnet/illustrator/sdk/CC2014/Illustrator%20Scripting%20Reference%20-%20…

shows cycling through each char.

I created a swatches script with the help of some of the people on here.  Just note that it is made for CMYK not RGB but you could change it to help.  It goes through the objects one a time and grabs its color and makes it a swatch spot color, then assigns that spot color to the object.  A little editing and this script should do what your wanting.

//Created by Zantcor 2-4-15


#target illustrator


var docRef = app.activeDocument;  
var paths = docRef.pathItems;  

//first we have to remove all the swatches except for the registration (swatch 0) to prevent mistakes later in the script and printing process
 var doc=app.activeDocument;  
            for(var i=doc.swatches.length-1; i>1; i--)
            {  
                doc.swatches.remove();  

            }  
        
var doc= app.activeDocument;
var L=docRef.pathItems.length;


for (i=0;i<L;i++)
{
     myItem=doc.pathItems;

        
          if (myItem.fillColor=="[CMYKColor]")
          {
               var c=Math.round(myItem.fillColor.cyan);
               var m=Math.round(myItem.fillColor.magenta);
               var y=Math.round(myItem.fillColor.yellow);
               var k=Math.round(myItem.fillColor.black);
               alert ("pathItem number: "+(i+1)+" \n cyan: "+c+" \n magenta: "+m+" \n yellow: "+y+" \n black: "+k);
           }//end iff

     //sets up the new swatch with the same CMYK values as the first path item but makes it a spot color
     //this will let the printer see only one color instead of four for cmyk
     
     
     var replaceColor = docRef.spots.add();  
     replaceColorColor = new CMYKColor();  
     replaceColorColor.cyan = c;  
     replaceColorColor.magenta = m;  
     replaceColorColor.yellow = y;  
     replaceColorColor.black = k;  
     replaceColor.name = "Color" + (i+1);  
     replaceColor.color = replaceColorColor;  
     replaceColor.colorType = ColorModel.SPOT;  
     replaceColor.tint = 100;
     

     //grab color swatch that matches the path item number
     //the swatch should be the same color as it was just made, but it is now a spot color
     
        var ncolor = doc.swatches[i+2].color;
        
        if (doc.pathItems.fillcolor = true)

        {      
        doc.pathItems.fillColor = ncolor;

        }//end if
        
           
  }//end for

         
 //this is to list the number of colors that the printer will see, along with the list of color names that are in the ink list
 alert("You have " + app.activeDocument.inkList.length + " colors and your active colors are" + app.activeDocument.inkList); // returns: "undefined"