does some one have an idea how to get a champaignr colour or silver colour or gold colour on a rose previously done in white? I have seen that
silver colour is like mixed in to a thick cream when accents are given to flowers. any idea willbe welcomed.

Use silver, gold highlighter (i.e. like luster dust), add vodka until it has mercury consistency, do not paint it on but rather dab it.

HTH

I bought the silver highlighter from a cake shop that is like a luster dust.. But on the bottle it said not for consumption.. So i was scared to use it.. Does that mean if you use it on fondant and it touches the cake you can't eat that part..

Yes, the same for silver dragees.

Most people do not eat the flowers as they are made out of gumpaste so that is why I recommended the highlighter.