Scottish Shorthair is DOMINANT to Coffee & Cream No.1
The baby of Ebony & Montgomery shows Scottish so hides Snowshoe Red or Ebonys hidden.
Ebonys Hidden is Coffee & Cream No.1 so the baby hides Snowshoe Red or Coffee & Cream No.1, therefore Scottish is Dominant to Coffee & Cream No.1 and I'll be popping the box to see which is it

Proof that Ebony hides Coffee & Cream is in the second gyazo.
Red shows dads fur and his hidden comes from mum Ebony. Baby had Coffee & Cream No.1 proving this was indeed Ebonys hidden fur.
Can end the test with the coffee & cream baby as it must hide Dads Blue Marble.