At first I thought id do royal blue and yellow but I recently had posted an outfit with yellow accents and it felt wrong to be using the same colours for this theme. Pink came to my rescue.
The only principle I know about colour blocking is that, one should not use more than 3 colours when putting together a colour blockin outfit. So, I used royal blue, plum and pink - I did pretty good, I think - the colour mix well. What is your opinion?