As far as i know and relating to "The Mustang and Cougar Tagbook" from Kevin Marti, in 1965 every Interior Code starting with D and F had a white interior with colored appointments.
In 1966, for D and F it changed from white to parchment, which is slightly darker than white.
It's more complicated with some of the interior codes starting with 6, where the seats and the doors are two-tone colored.
In 1965 only white was used (f.e. 62-blue and white). In 1966 there were codes using white (62-blue and white, 67-aqua and white, 68 ivy gold and white) and one code using parchment (64-emberglo and parchment).
About your dash: Yes it should be Ivy Gold.
Hope that helps.