The number that makes the whole thing blue would be, in RGB, a 0 for red and green, and a full value for blue. This could be interpreted as FF or 255, or 1 as in 100% of the blue channel on. Also, in statistics and computer science, 0 usually means false and 1 is true,  which would also make 1 the number that makes the whole thing true.
the pivot point is more valuable to me, in a song. (the "whatever"). It's like when you sell a basket. the value of the basket is not based on the item you'll put in it today, tomorrow, or any other specific day. The value of the basket is that it's the hinge point between all possible things that COULD potentially go in the basket.