Help!

I'm getting very serious about the Olivier Pullover.  Yesterday, I spent ages researching yarns and looking at color charts until my eyes crossed.  And I still can't decide. The thing about colors is that there are too many.  Henry Ford had it right:  black is enough.

I have some colors that I don't particularly like to wear - those would be anything in what my mother used to call 'earth tones'.   She was mad for golds, browns,  and beiges.  When I was a kid, it seemed to me that our whole house was decorated in those colors.  It was probably trendy but I grew to quite dislike these colors. 

My favorite color is red...but I have enough of that.  And, the tweeds don't actually come in real reds - or in my number two color which is yellow. 

This leaves me with blue.  It was my favorite color until I grew up, left home and discovered how many other colors there were in the big city.  But, blue denim is one of my favorite fabrics to wear and that's not just because of how comfy it is. 

Green makes me happy and I like almost every shade of green.  I have had several pieces of green clothing but find that I only have one left now.  And, gray is a work horse kind of color which goes with every thing. 
So, in this post are photos of the colors I have come down to -  but I can't make up my mind.  From the top: morning mist (I'd buy it for the name);  spruce;  and, slate.

Can you help?  Which one do you think would look best knit up into this pattern?  I've put a survey in the sidebar...you can vote for your choice.