I think you are worried of hepatitis, putting all symptoms together.
Usually viral hepatitis
presents with fever, vomiting
, abdominal pain
, reduced appetite etc.
From what you say child had cold and cough from which he is recovering.
His activity is good.
His reduced appetite may be because of the cold and cough he has.
Stool color may be non specific.
You may wait for a couple of days since there are no major symptoms at present.
Offer him food items he likes. Divert his attention and offer him food items. Give him lot of plain water and juices if he likes.
If food intake continues to remain poor or he develops poor activity, fever, vomiting etc, please do not hesitate to contact your pediatrician
And hope you have given him all vaccines as recommended.
Hope my answer helps you.