I am making my best friends wedding cake next weekend. I am matron of honor and of course she has enlisted me ont his task , she just gave me the pic of the cake she wants. It is a white fondant cake with dark navy blue modern peacock feathers. It appears to be piped on. My questions are: how do i get navy blue color in my icing ( i was thinking royal blue + violet?)
2. Will the color bleed onto the white fondant in the humidity (cake will be inside a./c), how far in advance can i pipe the design.
3. do i use royal icing to pipe the design or buttercream or something else. my experience with royal icing is that it gets really dry and brittle and can crack off....butttercream seems to flow much better but doesn't get a hard finish.

this cake is mainly for looks because she had a bakery do 250 cupcakes for the main servings. What to do what to do!

any help for you experienced Cakers would be appreciated!!!!!!!!

I'd think it would be better with the royal icing. The BC will get soft and might start to look a little greasy against the the fondant. Royal icing will have a cleaner finish. For Navy Blue, i would mix blue with a little touch of black.

To get your navy color you'll need to do a teeny tiny bit of black to royal blue. I think the violet will take you too much to the purple side.

I second that sugarbaker 05. The shirt cake I made in my gallery was made with mostly blue and a little black. The royal icing will not bleed on the fondant bc will if it melts.

thanks for the suggestions! hope to post a beautiful cake next weekend!

,,,,,,,,BC will get soft and might start to look a little greasy against the the fondant,,,,,,,,,,,,,,,

I use b'cream on 99% of my cakes and it does not melt nor bleed. As long as the cake is not refrigerated there should be no problem w/it .
Your comment about royal drying and cracking tells me you have overwhipped it - it is too stiff and needs to be more of a medium consistency.
Same with b'cream. If it is the proper consistency it will not melt. Try INdyDebi's icing recipe. I can't speak from experience as I didn't know about it until after I retired but I hear many, many good comments about it - expecially from people in hi humidity areas.