FrX,
I can understand the use of the same colour for all hands except the date hand. As someone pointed out, nobody expects to use this as a daily precision instrument. But the date hand is used every day and could be confused with the time minutes-hand.
Such an elegant watch may suffer from multi-coloured displays like those on an Omega Speedmaster Olympics or Zenith Rainbow chronograph.
Maybe a solution like blue hands for Time display, black hands for Chronograph display and silver hands for Calendar display?
The crucial contrast is that the Time minutes-hand (blue) must be different from the Date hand (silver/chrome).
Whatever the colour, the dial is very legible despite so much information being shown. With increasing age, this is an increasingly important feature for choosing a watch!
Regards,
MTF