I stumbled across this awesome script, and I've used it on a few projects. However, currently, I need to use swatches out of the Pantone+ Solid Coated book (Spot colors)
When I convert the script from CYMK to RBG, the RBG codes come out as Nan,Nan,Na instead of the actual numbers. I even redownloaded the script, changed ONLY line 17, and still received the error. I thought maybe I had broken something previously, as I've changed sizes, padding, etc a number of times. 
Something I'd also really like to be able to do is have it display HEX code, instead of RGB or CMYK, but none of my attempts have worked.
I appreciate any help you all can give me!
/////////////////////////////////////////////////////////////////
// Render Swatch Legend v1.1 -- CS, CS2, CS3, CS4, CS5
//>=--------------------------------------
//
// This script will generate a legend of rectangles for every swatch in the main swatches palette.
// You can configure spacing and value display by configuring the variables at the top
// of the script.
// update: v1.1 now tests color brightness and renders a white label if the color is dark.
//>=--------------------------------------
// JS code (c) copyright: John Wundes ( john@wundes.com ) www.wundes.com
// copyright full text here: http://www.wundes.com/js4ai/copyright.txt
//
//////////////////////////////////////////////////////////////////
doc = activeDocument,
swatches = doc.swatches,
cols = 20,
displayAs = "CMYKColor", //or "RGBColor"
rectRef=null,
textRectRef=null,
textRef=null,
rgbColor=null,
w=150;
h=100,
h_pad = 10,
v_pad = 10,
t_h_pad = 10,
t_v_pad = 10,
x=null,
y=null,
black = new GrayColor(),
white = new GrayColor()
;
black.gray = 100;
white.gray = 0;
activeDocument.layers[0].locked= false;
var newGroup = doc.groupItems.add();
newGroup.name = "NewGroup";
newGroup.move( doc, ElementPlacement.PLACEATBEGINNING );
for(var c=0,len=swatches.length;c<len;c++)
{
var swatchGroup = doc.groupItems.add();
swatchGroup.name = swatches
x= (w+h_pad)*(c% cols);
y=(h+v_pad)*(Math.floor((c+.01)/cols))*-1 ;
rectRef = doc.pathItems.rectangle(y,x, w,h);
rgbColor = swatches
rectRef.fillColor = rgbColor;
textRectRef = doc.pathItems.rectangle(y- t_v_pad,x+ t_h_pad, w-(2*t_h_pad),h-(2*t_v_pad));
textRef = doc.textFrames.areaText(textRectRef);
textRef.contents = swatches
textRef.textRange.fillColor = is_dark(swatches
//
rectRef.move( swatchGroup, ElementPlacement.PLACEATBEGINNING );
textRef.move( swatchGroup, ElementPlacement.PLACEATBEGINNING );
swatchGroup.move( newGroup, ElementPlacement.PLACEATEND );
}
function getColorValues(color)
{
if(color.typename)
{
switch(color.typename)
{
case "CMYKColor":
if(displayAs == "CMYKColor"){
return ([Math.floor(color.cyan),Math.floor(color.magenta),Math.floor(color.yellow),Math.floor(color.black)]);}
else
{
color.typename="RGBColor";
return [Math.floor(color.red),Math.floor(color.green),Math.floor(color.blue)] ;
}
case "RGBColor":
if(displayAs == "CMYKColor"){
return rgb2cmyk(Math.floor(color.red),Math.floor(color.green),Math.floor(color.blue));
}else
{
return [Math.floor(color.red),Math.floor(color.green),Math.floor(color.blue)] ;
}
case "GrayColor":
if(displayAs == "CMYKColor"){
return rgb2cmyk(Math.floor(color.gray),Math.floor(color.gray),Math.floor(color.gray));
}else{
return [Math.floor(color.gray),Math.floor(color.gray),Math.floor(color.gray)];
}
case "SpotColor":
return getColorValues(color.spot.color);
}
}
return "Non Standard Color Type";
}
function rgb2cmyk (r,g,b) {
var computedC = 0;
var computedM = 0;
var computedY = 0;
var computedK = 0;
//remove spaces from input RGB values, convert to int
var r = parseInt( (''+r).replace(/\s/g,''),10 );
var g = parseInt( (''+g).replace(/\s/g,''),10 );
var b = parseInt( (''+b).replace(/\s/g,''),10 );
if ( r==null || g==null || b==null ||
isNaN(r) || isNaN(g)|| isNaN(b) )
{
alert ('Please enter numeric RGB values!');
return;
}
if (r<0 || g<0 || b<0 || r>255 || g>255 || b>255) {
alert ('RGB values must be in the range 0 to 255.');
return;
}
// BLACK
if (r==0 && g==0 && b==0) {
computedK = 1;
return [0,0,0,1];
}
computedC = 1 - (r/255);
computedM = 1 - (g/255);
computedY = 1 - (b/255);
var minCMY = Math.min(computedC,
Math.min(computedM,computedY));
computedC = (computedC - minCMY) / (1 - minCMY) ;
computedM = (computedM - minCMY) / (1 - minCMY) ;
computedY = (computedY - minCMY) / (1 - minCMY) ;
computedK = minCMY;
return [Math.floor(computedC*100),Math.floor(computedM*100),Math.floor(computedY*100),Math.floor(computedK*100)];
}
function is_dark(color){
if(color.typename)
{
switch(color.typename)
{
case "CMYKColor":
return (color.black>50 || (color.cyan>50 && color.magenta>50)) ? true : false;
case "RGBColor":
return (color.red<100 && color.green<100 ) ? true : false;
case "GrayColor":
return color.gray > 50 ? true : false;
case "SpotColor":
return is_dark(color.spot.color);
return false;
}
}
}
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