The mural in the previous room shows the answer. It has different card suits on it, and in order it's heart, club, spade, diamond. The statues in the next room are supposed to match the colors those suits *usually* are in playing cards, so set the statues to red, black, black, red. It's really simple but I was so frustrated because I didn't get it lol, and I could only find help on the JP walkthrough.



Anyways, before anyone who thinks this is obvious comes to comment, I'll just say that both a lot of modern playing card sets and other video games will show some of these suits in colors other than red or black (I've seen clubs as green and diamonds as yellow for example). And the game can have some pretty obtuse puzzles, but I think that's part of the charm. Hope this is helpful for anyone who needs it.