OPI's Nail Polish in (You Don't Know Jaques....

I love this color too. Depending on what I am wearing, it can sometimes have a purple hue to it, or a brown one. Very versatile color. A cool tone.
 
I'm pale with warm undertones. I agree that that YDKJ looks darker on than expected. I was unsure of how much I liked it when I wore it but I got compliments on it so that helped nudge it over to "like" status for me.