thats a pretty interesting coloured mum! what colour is it? chocolate and lavendar? from the top pic it looks like a lavendar body with a chocolate head? odd, i've hatched out bronze heads on blue bodies.
if the drake that fathered the eggs was silver all the ducklings would have atleast one dose, so blue, silver, blue fawn.
the yellow ones wont be white with those coloured parents, it'll most likely be barred of something or rippled? i have no experience with ripple but all my barred ducklings are yellow at first.
beak colours definately tell you about the colouring, black for blacks, blue for blues and silver etc. pink and brown beaks here mean bronze. so for me, if i get a yellow duckling with a blue beak it'll turn out blue barred.
we dont have ripple or chocolate here so hopefully someone who has can help out with those caramel coloured ones there. i like the odd colours, i has some caramel coloured ones hatch out 4 weeks ago, the coloured feathers are just peaking through, they are looking bronze, but the mother has lavendar, so i think that the lavendar gene has diluted the bronze a bit, never a dull moment in mussie colour world!