Possible cat breeds in my cat?

Hi Everyone!

I've always been curious about what breed(s) or cat Bella has, because she looks a bit featurally different from my DSH diluted tabby; Bella has greener eyes, a longer tail, and her head and face is a bit more angled. any thoughts?

I wonder what she was thinking about?

I'm not sure, but I did name this picture "The Thinker" haha! 

With that head and the eyes, she could even have a Russian blue ancestor not so far ago.   What is the exact color of the dark parts on her fur?  Is it dark grey as I think?

If so, she is a grey and white bi-color.

But as said, not impossible she has roots among the Russian Blue.   Whom are called for blue, but its really a grey color.