Hi Donald, this may be tough because Trilliums weren't painted at the factory, but had a color gelcoat. Over the years, UVs cause gelcoat to change color. You might look inside a cabinet and try to match the appropriate paint
type to the color you find there. Or maybe you'll be lucky and someone will answer up!
The only color codes I have for Trilliums is for the light
beigy color and that's because folks were trying to do minor touch ups after some small bodywork.
Best of luck!