*Reproduction steps:*
1. Create a new project
2. Open Tile Palette window (Window > 2D > Tile Palette)
3. Create New Tilemap > From Tile Palette
4. Press on Tilemap dropdown and observe the selection icons

*Actual result:* Rectangles are seen instead of the icons
*Expected result:* Icons are visible

*Reproducible with:* 2022.3.66f1, 6000.0.58f1, 6000.2.4f1, 6000.3.0b2
*Couldn’t reproduce with:* 2021.3.56f1 (No Tilemap icons)

*Reproduced on:* Windows 11, macOS Sequoia 15.6 (Intel)

*Note:* Icons can only be seen when hovering over the dropdown selection but they’re barely visible on Light Theme