I've recently purchased the Williams Bro.s 1/32 scale kit of this racer. The kit instructions say white, but the box art shows a creamy off white, which I believe is correct. The pic you posted looks great but a bit too white .
Here's the box art.
On the back of the box are profiles of the various versions this kit can be built into. Notice the difference of the white from the Gilmore Special #121 and racer #92.
My goal when I build this kit is a very light latte color. Starting with white and adding drops of light tan or sand .
I also agree that the red stripes and lettering are a little darker red although the kit says "red".
Hope this helps and good luck .
Howard