Here, "good" is on the left and "bad" is on the right. The color is orthogonal (it gives the number of operations with latencies in a given bucket). For example

Here, "good" is on the left and "bad" is on the right. The color is orthogonal (it gives the number of operations with latencies in a given bucket). For example, a red square on the right side of the output would have definitely been "bad".