Cream is both a color description and a genetic term. In genetics, cream is diluted gold and a bird needs to get the cream genes (ig) from both parents to look cream. Some birds are lacking these diluting genes so they end up more gold colored than cream. Some have one set of cream genes and because Gold seems to act like an incomplete dominant gene when combined with lots of other genes, sometimes a bird will look like they are somewhere between gold and cream. 2 genetically cream parents will create 100% cream offspring.
I would encourage you to read the Cream Legbar Draft standard for a complete list of features for the cream variety of Legbars. There are also a lot of pictures and lots of information at the Cream Legbar Club site.
A cream hen will look like creamy off white to pale buttery yellow in the hackles and have lots of gray or grayish taupe in her body feathers. If she is carrying genes for lots of Autosomal red she could have bit of a reddish sheen over her wings, but this is not desirable. The breast is usually a pinky salmon.
A gold hen will look more yellow or even orange in the hackles, and have a brown body with an orange overtone to it. The standard is still being written for this color set but you may find it referred to as the crele or gold birds (even though both varieties are crele pattern, just one is cream crele and the other gold crele). The breast is usually a brighter darker orange salmon.
A cream cock will have creamy off white to pale buttery yellow hackles and saddle feathers, and their shoulder and back should have chestnut mixed with cream making the chestnut look like smudges. If you gently pull a wing out the flight feathers should be white, cream, and dark gray barred. Some birds are missing this barring, but it can be bred back in.
A gold cock will usually have yellow straw colored hackles and saddle (the saddle can also look bright orange if they have lots of red), a more solid red/chestnut shoulder and back, and golds and browns showing up undiluted in the flight feathers of the wing.
The in-between birds can show a mix of the features above, and any bird with excess autosomal red can totally break all the rules (since autosomal red can not be diluted by ig). There is still a lot that is being learned about this breed. We don't know it all! I hope that helps! Best wishes!
Cream pullet and light cream cock
In-betweener cock. He produced lots of gold birds but I did get a cream pullet from he and a cream hen proving he had one set of cream genes.
Gold cockerel, hard to see since he was just growing in and I culled his hatch so I don't have further pics, but you can start to see the golds and lots of red in the shoulder coming in.