def to_rgba(color, alpha):
    """
    Converts from hex|rgb to rgba

    Parameters:
    -----------
            color : string
                    Color representation on hex or rgb
            alpha : float
                    Value from 0 to 1.0 that represents the 
                    alpha value.

    Example:
            to_rgba('#E1E5ED',0.6)
            to_rgba('#f03',0.7)
            to_rgba('rgb(23,23,23)',.5)
    """
    if type(color) == tuple:
        color, alpha = color
    color = color.lower()
    if 'rgba' in color:
        cl = list(eval(color.replace('rgba', '')))
        if alpha:
            cl[3] = alpha
        return 'rgba' + str(tuple(cl))
    elif 'rgb' in color:
        r, g, b = eval(color.replace('rgb', ''))
        return 'rgba' + str((r, g, b, alpha))
    else:
        return to_rgba(hex_to_rgb(color), alpha)