This reminds me of the morning color if you will...so after being asleep all night and having no exposure to light- your beardie may be a little darker- the beardie will resume it's normal color within the hour if your lighting is correct.
When you take your beardie outside it may change color.
When your beardie is excited- it may change color- (gets bright - light)-
When you have a spoiled beardie like mine who doesn't get his way, he turns gray but brightens to the touch as soon as I give in.
Of you are in for so much- so many surprises beyond the
black beard with it gets mad.
It's actually cute to me- you learn what each color means /associate it with behaviors.
@Pat26_
Be very careful because color changes can be associated with health concerns - this is why you hear the responses about lighting- temperature. They are so very important!