Today is Earth Day, and I made a bento of Hello Kitty hugging the Earth.
I finally got hold of some dried blue pea flowers (also called butterfly pea flowers or bunga telang in Malay) and extracted the liquid by soaking the flowers. Thereafter I used that blue coloured liquid to cook the rice. Perhaps I should have soaked the flowers for a longer duration, as the rice turned out to be a very pale blue after it was cooked.
I used the blue rice to make the Earth that Hello Kitty is hugging in the bento, and some rice mixed with green furikake to get the continents. I was rather disappointed that the colour contrast between the blue and green did not turn out very well, next time will experiment with other ingredients to use.