Do beardies tummies change color as they grow up

[Batfreddy]

I have a juvenile beardie about 6 months old, I noticed her beard starting to turn orangish yellow as of lately. Her stomach and her tail are turning yellowish (a little orange, mainly yellow) I was wondering if it changes color from the white as they get older. If not then I'm going to take her to a doctor ASAP. Shes a brown/tan color on her body with some rusting orange spots, and her head is golden yellow

 

[Gail]

They generally stay whitish but some can develop color. Could you please post a picture? especially of the tail area?