AHi, I've been asked to make a 3tiered multi themed wedding cake which will sit on a 'staired' cake stand so that every theme of each cake will be seen. One is science themed and the other a cow themed cake. The third one is just the top tier with no specific theme. I'm worried about the colours not coordinating because each theme is very different and each call for very different colours themes. The science one is very colourful,whereas the cow one is mainly black, white and green. I know I'm Stressing a bit...