I am going to build a T&T horizon series 9wt (dark navy blue blank) and was looking for some suggestions for thread color. I was thinking a chestnut brown might look good but would like some other ideas.

Ken,
I just finished a Forecast, 4 pc 5wt. The blank is a beautiful dark blue. I used Gudebrod garnet with no CP and tipped the wraps in gold HT metallic. The results are very nice. The garnet wraps look like jewels against the blank. Silver metallic would have been nice as well. I remember reading about this color combination on the board here and the advice was, as usual, right on the money. Good luck on the project.

Colors/Shades of browns trimmed in red/gold. Colors/Shades of red trimmed in gold/yellow.

Regards......Doug@
TCRds

Ken,

Garnett with teal trim wraps no CP - Look very sharp over dark blue

Hank
On The Rocks Fishing
Wells, ME.

Colbalt Blue trimmed with Goldenrod.I used this on a Matte blank but it might work ok on the dark Blue as well.