Convert RGB value to Hex

#!/usr/bin/env python

# File:rgb2hex.py
# simple utility to convert rgb values to hex 
# within Scribus

import scribus

colorN = 255
while colorN != 0:
    color = scribus.valueDialog('Color Values','Enter the RGB value, 0 to quit')
    if color == '': color = '255'
    colorN = int(color)
    hexN = hex(colorN)
    result = scribus.messageBox ('Hex Value','RGB value of '+ color + ' is \n Hex value of '+ hexN,scribus.BUTTON_OK)