25th anniversary cake should
be more appropriate if designed in silver. It is a firmly common sense
to associate number 25 with the color silver. While direct correlation
between the two aspects is still debatable, it is safe to say that the
color silver symbolizes a relationship that goes into further stage of
maturity.
The 25th year of a marriage is already a mileage for a relationship
because to have been able to establish a connection with someone other
than you for that long is something remarkable on its own. So, it is
only logical to provide a 25th anniversary cake
to accompany the scene. Further alteration and addition can be applied
to a 25th anniversary cake based on the overall theme the event is
designed on. It can be made to match in accordance with the decorative
elements occupying the hall in which the occasion is to be held.
Source: http://weddingcakesdesignsidea.com