Yes, all of the ships with 'larger' (I assume) ordnance for their primary gunnery were assigned color dye (that must have been placed inside each warhead at the munitions factories.)
I was researching for some exact information on two of the Iowas and was reffered to A.Toppan's 'NavWeaps' pages and I simply used:[green dye bag BB-64] You can read about the Iowa-class 16"/50 (40.6 cm) Mark 7 here:http://www.navweaps.com/Weapons/WNUS_16-50_mk7.php
Scroll down to 'Ammunition' and read about the 4X dye colors #2a.


BTW, there is also a 'NavWeaps' data page on the ''14"/45 (35.6 cm) Marks 8, 9, 10 and 12'' guns with 'Ammunition again listing 'dyecolors' :
Nevada - Orange, Pennsylvania - Red, New York and Texas - No dye

I was surprised to find the ammunition dye colors for the Iowas.