Timmen 89Z ( or Timmen 784 )
I have the 89Z, ( need to get the 784. ) If I can't find the 784, then it'll be the 89Z forever. Both are medium blue washes and it's a lot easier to coordinate with medium/dirty blue washes than extreme dark or lights.
Timmen 784 - ebay photos; not mine
Timmen 89Z - ebay photos; not mine