George,
According to Capt. Chuck, the off-white is Hattaras White. I had Tom Fabula of Signature Finish match the gel coat on a plug I cut out of inner liner for a phye plate next stbd stern seat. As you can see in this picture, it was a pretty close match to the gel coat on outside of hull.
The paint is on sides of steps and between bootstripe and bottom; it's original gel coat above the bootstripe.) If you'll PM me with an address, I can send you a small sample of it. Matching gel coat can be tricky due to fading, etc. Denny