All shelves have the oak tan map color

Unlike other wooden blocks, shelves of different types cannot be differentiated on a map by their color, despite having a wide variety of colors. Instead, all shelves will show as oak tan on maps (the same color as bookshelves).

Expected behavior

Shelves match the color of other blocks of their wood type on maps.

Actual behavior

All shelves are tan on maps.

Steps to reproduce

1. Create a filled map

2. Place a row of planks from each wood type

3. Place a row of shelves from each wood type

4. Observe that the planks show as different colors on the map, while the shelves are a single color