Clear the Food Coloring blocker by making 4 matches on adjacent pieces. Clearing this blocker will change the color of gems where the match was made. There are 4 stages that the food coloring will change through:

Stage 1 - Empty container, cap on

Stage 2 - Food coloring is filled halfway with color.

Stage 3 - Food coloring bottle filled with color.

Stage 4 - Cap comes off, bottle will spin in a circle and change the colors of the blocks around it.

Food Coloring is introduced in Level 1546.