Yes, I can't read this either. Also, consider using a sequential color scale, rather than diverging. A diverging color scale should be reserved for datasets with a neutral value or natural midpoint. For example, if you were displaying growth, zero would be the midpoint, to quickly differentiate between positive/negative growth.
There is no meaningful midpoint here. A sequential scale from light to dark would be easier to read.
There is no meaningful midpoint here. A sequential scale from light to dark would be easier to read.