Angular FormArray Checkbox or Radio functionality

I have a FormArray that dynamically produces pre-populated inputs for the purpose of displaying and editing. On each of these inputs there is a radio button attached to it.

I basically need a cross between a radio and a checkbox.

This is what I need to have.

1. When selected, the value should be true (like a checkbox). When not selected, it should be false.
2. I should only be able to select one of the inputs.

<div formArrayName="exampleForm">
  <div *ngFor let ex of example.get('exampleForm')['controls]; let i = index>
    <div [formGroupName]="i">
      <example input field>
      <input 
        type="radio"
        name="exampleRadio"
        formControlName="exampleRadio"
       />
    <div>
  <div>
<div>

Example:

Each of these would be inputs so the text is editable. Also it is dynamically created from the database, so there's no set amount of fields.

1. Purple 🔘
2. Red 🔘
3. Green 🔘

Whichever of these is selected, the value needs to be true, rather than the value of whatever input it is attached to.

Thanks in advance!