I think you meant 8 stone 4 lbs
And I think Wetter was teasing a little 
There is hige individual variation for fluid requirement. It depends on ambient temperature, relative humidity, what clothes you're wearing, what activity you're doing, the duration and intensity of activity...
So in short, there is no one recommendation that suits everyone.
The best way, as already said, it to assess urine colour and frequency.
I'd probably aim for the second colour - it leaves you scope to drink in hotter weather without overhydrating too much 