Angular 2, using ngClass with conditionals in ngFor

I have ngFor loop that displays data, and based on if something is true or false in that loop, how can I change css? What I tried, does not work for me.

HTML

<div class="class" *ngFor="let something of something" [ngClass]="{'classno2': sent}">
    <div> {{something.name}}
    </div>
</div>

TypeScript

something;

this.something = [
    {name: "NAMEE", sent: false},
    {name: "NAMEE2", sent: true},
]

CSS

.class {
    color: red;
}
.classno2 {
    color: blue;
}

I get no errors, but yet nothing changes.