1. Open assets/minecraft/optifine/cem/enchanting_book.properties.
2. Replace models.1=1 with the chosen number below.

1 = the default model, also original light blue.
2 = blue (original light blue)
3 = purple
4 = pink
5 = red
6 = orange
7 = gold
8 = green
9 = dark
10 = white
11 = flame
12 = water
