| Clue | Source | Date |
|---|---|---|
| Shades can be seen on them | Universal | 09 Nov 2025 |
| Designers' tools | The Washington Post | 05 Dec 2020 |
| Designers' tools | LA Times Daily | 05 Dec 2020 |
| They're made of shades | Universal | 25 Dec 2019 |
| Reference aids for artists | New York Times | 01 Sep 2019 |
| Reference aids for artists |