If it is, the fact that none of us can tell should speak volumes. BD does have a group of girls named after colors, after all.
What I find interesting about this girl named 4t - the name was already mentioned a few updates back, in the first update BD released after his 2-year delay.
There were no images and I'm not even sure it was mentioned it belonged to a girl (I think so though) - but no one said anything about that - the focus was completely on the break/dependencies of the missing rework, unknown characters like Granny, and so on.
And now it's like no one ever heard of 4t. It's understandable, the name is forgettable like her - but we had months to laugh at that - and still, no one did.