Customizing source-highlight's color schemes?

The source-highlight package is installed on my system. It highlights files I view with less using /usr/bin/lesspipe and LESSOPEN environment variable. Now, I want to change the color scheme this mechanism uses for some/all filetypes. I have root on the machine. How do I do this? Note: It's a Devuan 3 Beowulf (~= Debian 10 Buster) Linux distribution.