Colors and corallites do change, especially with frags, since they're usually taken from the tips.
This was my original picture of the one that I received with lineage on 5/22/17.
I chunked it in half and split the other half to my buddy. Here it is mounted on the rocks on 6/5/17.
Here it is as of today, both sides of it (one side gets more light). You can compare it to the pic above to see how the branches and corallites are thickening.
Less light
More light where the encrusting edge is growing out.