You can bind to the color
object you're displaying:
<select ng-model="color.levelmodel" ng-options="c.id for c in levels">
<option value="">-- choose color --</option>
</select>
or to the selecteds
object like this:
<select ng-model="selecteds[$index].levelmodel" ng-options="c.id for c in levels">
<option value="">-- choose color --</option>
</select>
Where $index
is the current index of the color
object inside the colors
collection.