Cannot change Android Studio Logcat colors
To change the Logcat colors you can go to goto File > Settings or press Ctrl+Alt+S.
You can see this similar UI assuming you are using Darcula Theme
Note you need to unchecked Use inherited attributes in-order to modify the color.
You cannot change the default so first you need to creat your own configuration by clicking on "save as" button.
After doing so there is a check-box below the all available color options, Entitled "Inherit Attributes From Console", Untick that checkbox will enable all color options for you.