I don't think that this is a programming question as this doesn't need a custom formula. However, to answer your question this is how you do it.
Create Conditional Formatting.
Click on the Color Scale Tab.
Select the Range of Data to Apply this.
I would suggest adjusting it via percentile due to the nature of your data.
Then Apply the Color you want to be applied.
Note: You can adjust the gradient by adjusting the mid point.