Joy's blue hair was to differentiate her from Tinker Bell. Joy's eyes might be because of Riley's eyes, as she was the first one to be created in ger mind. As with Anxiety, her eyes may show how crazy the emotion can get.
Or it might be due to yellow being too bright and difficult to produce without having a wishy-washy effect. Then they chose blue for the reason you mentioned or the link to Sadness.
My central emotion is fear and my secondary in command emotion is anxiety because i have social anxiety and always anxious and nervous around people all the time
You can get different types of features from you family members like my friend has blue eyes and her parents have black eyes but her grandma has blue eyes so you can get different features from your family members
Just to let you know at the end of inside out she had like 7 islands then for some reason I’m inside out 2 they are gone now so now just 5 islands weird right?
I’m still confused on where in the movie after goofball island disappeared, joy and sadness look over at the other islands and the one next to goofball seems to be missing…then it is shown falling apart later in the movie?