new DVColor(r, g, b, a)
    The Formated Color Class of DVisual
    Parameters:
| Name | Type | Description | 
|---|---|---|
r | 
            
            double | the Red component of RGBs,0 in default,[0-256] | 
g | 
            
            double | the Green component of RGBs,0 in default,[0-256] | 
b | 
            
            double | the Blue component of RGBs,0 in default,[0-256] | 
a | 
            
            double | the Alpha component of RGBa,1 in default,[0-1] | 
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Methods
tostring() → {string}
    translate the color to the html color style
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Returns:
    the rgba style string
- Type
 - string