How to apply terminal colors system wide? (using /etc/profile.d or similar)

I use the Base16 for Shells scripts to change my shell's default ANSI colors. For instance:

That script changes terminal colors from this (I'm using openSUSE Leap 15.1 with GNOME 3.26.2):

i.sstatic.net/wwtl2.png

To this:

i.sstatic.net/aVdaR.png

It works not only on GNOME Terminal, but also on any virtual console (e.g. tty1).

But I need to call it every time I start a new terminal window/session, or add a call for it on ~/.bashrc.

The question is: how can I apply that color theme system wide? (so that all users get the same color theme applied)

Most pages out there explain how to customize PS1 or LS_COLORS, those are not what I'm looking for. That's why I started a new question.