Jcan,
There are a few other variables here as well. The TS-3 is Tamiya's rattle can correct, and I believe that is a lacquer not a an enamel, where XF-64 is an acrylic, so the paints themselves are different. You didnt provide two pieces if crucial info in your original posting.

1. Did you prime the plastic before sparaying the TS-3, and if so what color? Or is the TS-3 shot straight onto raw plastic? Because based on the photos provided it simply looks like there is some of the blue-grey plastic still showing through the base coat of Tamiya's TS-3.

2. Did you shoot the XF-64 shot over the top of the TS-3 or is it too shot on the raw or primered plastic. If you shot the XF-64 over the top of the TS-3 it will look more yellow as you have no color ghosting of the underlying color as is too is light in value and close to the same hue.

Like was mentioned earlier, Tamiya paints are usually very accurate and I too use them and Vallejo extensivley and have for better than 20 years. You didn't share your plan for what this tank will look like in the end (parade queen or grizzled veteran or somewhere in between) But either way try not to get to hung up on this base coat. Adding filters, washes, color modulation, panel fading or hi-lighting pastels, dry-brushing, oversprys of dust n grime, or any other of a wide variety of weathering techniques will and should change the look of the final color appearance.


Streetsquid