'**SUMMARY**
Get corresponding Hue value of the given BGR values
**PARAMETERS**
* *tuple* - a BGR tuple to convert to HSV.
**RETURNS**
floating value of Hue ranging from 0 to 180
**EXAMPLE**
>>> i = Image("lenna")
>>> color_tuple = tuple(reversed(i[100,300]))
>>> hue = Color.getHueFromRGB(color_tuple)'

@classmethod
def getHueFromBGR(self, color_tuple):

    a = color_tuple
    print a
    h_float = colorsys.rgb_to_hsv(*tuple(reversed(color_tuple)))[0]
    return (h_float * 180)
