Global Scale Modeller

I am building the Tarangus Saab Viggen 1/48
which I purchased from Ultimate a while ago
I am going to paint it with the two-tone grey camouflage as the splinter scheme is beyond my skills level
Unlike all the other kits I have built there is no detailed call out or colour references for painting the parts
There is some basic information in the instructions but no details
Can anyone help with this?
I use Tamiya acrylic paints

I did a bit of digging and from what I can see the call outs are for
FS 36495 & FS 36375

But unfortunately there don't seem to be direct matches from the Tamiya range so you might need to look around (or mix)