Colors are interesting part of this all, they can have many meanings that also change depending on who you ask. You have m@sonic meanings behind colors, chakra colors, colors in k@ba!!ah tree of life, etc. I remember J D often referred to different sources.
You're right, important colors here are blue (supreme color of Mas0nry), yellow (light, il!umination), white (pure), red (fire, regeneration), orange (orange chakra carries meanings associated with emotions, creativity, sexuality, and is associated with water, flow ).
Hourglass belong to S@turn (s@tan) symbolism, the scene has a red hue, and interestingly we see Jin on next scene. I don't know who sits on the white cube, but you could say it looks like he is sitting between to pillars, and the sun above him, very symbolic.
Edit: and I should add, that I'm not sure what they wanted to tell with the colors, there are many options