Ooh she's pretty! It's so hard to get a handle on the color "porcelain" from descriptions alone, and they are difficult to take good pictures of. I hope you do well in the show!
In person she looks Pewter & brown. Not a geneic name, but the best I could use to describe her. I have not been able to get a good photo yet. The others from this line have been a little lighter in color, she is the darkest, that is why I posted her, because you can see all the brown color in a photo. The birds look just like a Khaki Polish, if that helps. Not sure of all that is at work here, but these are my other projects! Working to get the coloring even and consistant! But every gen, has way more brown than the next, so time will tell!
Maybe try to take a photo in different light? Natural light in the shade against a strongly coloured background (green grass, blue, turquoise, red or pink blanket, etc.) usually helps make more subtle colours stand out better.