Issue with the primary key symbol

Hi I just started learning SQl and primary keys. After creating primary key and when I go to to the tables and then the key it shows horizon key in black instead of yellow vertical with yellow color. Can any one can help why it does that. or what am I doing wrong.

I don't think you're doing anything wrong - mine shows up as black as well.

because the training video shows yellow or maybe old version but thanks for the info