As of my last knowledge update in September 2021, the MSI Katana GF66 laptop did not have customizable RGB lighting for the keyboard or chassis lighting. MSI laptops typically offer RGB customization features for their gaming laptops through their "MSI Dragon Center" software.
Most MSI laptops come with pre-installed software for controlling the RGB lighting. Look for software like "MSI Dragon Center" or "MSI Mystic Light." If you have this software installed, you can use it to customize the lighting.
The MSI Katana GF66 laptop typically comes with customizable RGB lighting for its keyboard and sometimes other parts of the laptop, such as the logo or accents. You can usually change the lighting color and effects on this laptop by using MSI's software called "MSI Dragon Center" or "MSI Mystic Light."