Early 80s Miyata Silver Blue paint code

[halo makes]

Hi, my dad still rides the bike he bought when he was a teenager. When he was younger he painted it a different color (a little sloppily) and he's lamented doing that many times over the years. I'm wanting to polish things up and re-paint the frame, maybe make some replacement logos on a cricut for it. I'm pretty sure it's a 1981 Miyata 110 as pictured in this catalogue:

I'm wondering if anybody might know what a good paint code to match the original Silver-Blue frame might be? The bike is no longer that color and dad's memory is a little fuzzy so it would be difficult to try and match it with swatches, was hoping someone might know a close color off-hand. Thanks!