I know this question appears several times. But didn't found solution for my app. I'm coding a function to color user avatars based on their name initials.

color = this.hashStringToColor(id);

this returns a color. then i push it into an array.

this.colorsByUser.push({
     color: color,
     id: id
});

this array is declared at the beginning in this way:

colorsByUser: IProfileColors[] = [];

IProfileColors is an interface and contains just color and id. As you see, nothing special is here but i have this weird error that i infer that means i cannot add nothing to the array. Is the first time i face it. Any ideas? Thanks in advance.