change path color with time tag - CZML

I need to change path color with time tag. Below is my CZML which does not change color with time tag. What am I doing wrong. Any help is appreciated.

{

“availability”: “2013-03-25T17:41:00Z/2013-03-25T17:57:10Z”,

“id”: “0fe2de84-c447-4788-91b5-8839831a61ae”,

“label”: {

“text”: “EXAMPLE”,

“fillColor”: {

“rgbaf”: [0,

0.5019607843137255,

0,

1]

},

“font”: “10pt Lucida Console”,

“horizontalOrigin”: “LEFT”,

“outlineColor”: {

“rgbaf”: [0,

0,

0,

1]

},

“pixelOffset”: [12,

0,

0],

“scale”: 1,

“show”: true,

“style”: “FILL”,

“verticalOrigin”: “CENTER”

},

“billboard”: {

“horizontalOrigin”: “CENTER”,

“scale”: 1,

“show”: true,

“verticalOrigin”: “BOTTOM”,

“image”: “data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAkAAAAJCAYAAADgkQYQAAAABmJLR0QA/wD/AP+gvaeTAAAACXBIWXMAAA7DAAAOwwHHb6hkAAAAB3RJTUUH3QMPFAgjDCY/AQAAADFJREFUGNNjYCACMMIYGqc1/qNL3jC9wQhXhE0BskImYqxjwmcKXBHMXryKqOY7ogAAgkUQDFNBvnMAAAAASUVORK5CYII=”

},

“path”: {

** “color”: {**

** “epoch”: “2013-03-25T17:41:00Z”,**

** “rgbaf”: [**

** 2,1,0,0,1,**

** 4,0,1,1,1,**

** 6,1,1,0,1**

** ]**

** },**

“width”: 5,

“show”: true

},

“position”: {

“epoch”: “2013-03-25T17:41:00Z”,

“cartographicDegrees”: [0,

-103.0715,

44.14116666666666,

20000,

960,

-93.65152777777779,

42.01859722222222,

0],

“interpolationAlgorithm”: “LAGRANGE”,

“interpolationDegree”: 1

}

}

Actually, this looks like a bug on the Cesium side. It should be an easy fix. If you would like a temporary fix, you can go into Polyline.js and change

Polyline.prototype.setColor = function(value) {

if (typeof value === ‘undefined’) {

throw new DeveloperError(‘value is required.’);

}

var color = this._color;

if (!Color.equals(color, value)) {

Color.clone(value, color);

makeDirty(this, COLOR_INDEX);

}

};

to

Polyline.prototype.setColor = function(value) {

if (typeof value === ‘undefined’) {

throw new DeveloperError(‘value is required.’);

}

Color.clone(value, this._color);

makeDirty(this, COLOR_INDEX);

};

Also, I would recommend you specify a color at time 0, since you start at 2, that means your color is undefined for the first 2 seconds.

Actually, this is already fixed in the polylineMaterials branch, and will be in master as soon as that branch is ready.

Thanks you , do appreciate!