| Clue | Source | Date |
|---|---|---|
| Red-tinged jewelry alloy | Premier Sunday | 12 Jun 2022 |
| Pink metallic shade | Eugene Sheffer | 08 Jun 2021 |
| Copper alloy used in jewelry | New York Times | 27 Jun 2017 |
| Copper alloy used in jewelry | ||
| iPhone color choice | Wall Street Journal | 01 Jun 2016 |