I’ve looked at the controversial looking Centre Pompidou countless times, admiring its quirky appearance. (It created quite a stir when it was built - if you have noticed, it sticks out a bit from the rest of the city’s look.) I’ve passed by numerous times, but I never knew what the colors symbolized. We learned that the red tubes, which you can see here (it’s where the escalators are) are red to reference their role as the blood of the building - the people are the life flow. You'll have to go on the tour to find out what the rest of the colors mean though!