I gave 'he likes the blue one' as my answer and got it correct

i answered "she wants the blue one" and it was also marked correct :)

I think in Polynesian culture colors are described as either dark or light. There aren't as many colors as in other languages.

I don't think it's that fixed, but it seems like the main verb generally comes first. Here, you can distinguish between subject and object because the action is directed at "the dark one" due to the "i" in "i ka mea uliuli".