Web Viewer - It is not possible to specify a color in the ARGB format using the ItemElementCustomColor event

Im having trouble setting color to chart and pie chart elements. While using sample provided:
ConditionalColorSample . While it seems to semi work with hex color code and rgb, rgba alpha channel gets completely ignored resulting in incorrect color painting. Code snippet below.

JavaScript
SetCustomColor: function (s, e) {  
        var conditionalColorsArray = dashboardViewer1.cpConditionalColors;  

        var config = $.grep(conditionalColorsArray, function(item) {  
            return item.DasboardItemName === e.ItemName;  
        });  

        if (config.length === 0) return;  

        var measureDescriptor = e.GetMeasures()[0];  

        var configEntry = $.grep(config[0].TestEntries, function (entry) {  
            return entry.Measure.ID === measureDescriptor.Id;  
        });  

        if (configEntry.length === 0) return;  
        var data = dashboardViewer1.GetItemData(e.ItemName);  
        var currentElement = e.GetTargetElement();  

        var effectiveCondition = configEntry[0].TestDefaultCondition;  

        if (effectiveCondition == null) return;  

        var sliceData = data.GetSlice(currentElement);  

        var measureValue = sliceData.GetMeasureValue(measureDescriptor.Id).GetValue();  

        if (measureValue == null) return;  

        var nTarget = null;  

        if (effectiveCondition.DynamicTarget != null) {  
            var sliceMeasures = sliceData.GetMeasures();  
            var targetMeasureDescriptor = $.grep(sliceMeasures, function(measure) {  
                return measure.Id === effectiveCondition.DynamicTarget.Measure.ID;  
            });  

            if (targetMeasureDescriptor == null) return;  

            var targetValue = sliceData.GetMeasureValue(targetMeasureDescriptor[0].Id).GetValue();  
            nTarget = targetValue;  
        }  
        else if (effectiveCondition.StaticTarget != null) {  
            nTarget = effectiveCondition.StaticTarget.Value;  
        }  

        if (nTarget == null) return;  
        if (measureValue > nTarget) {  
            e.SetColor(effectiveCondition.RGBAAboveColor);  
        }  
        if (measureValue < nTarget) {  
            e.SetColor(effectiveCondition.RGBABelowColor);  
        }  
        if (measureValue === nTarget) {  
            e.SetColor(effectiveCondition.RGBAEqualsColor);  
        }  
    },  

The colors in effective conditions are in "rgba(r,g,b,a)" format.