## '''Toluidine blue'''. Used to demonstrate granules in mast cells. Nuclei are deep blue; mast cell granules are reddish-purple.

## '''Verhoeff-Van Gieson stain (VVG)'''. This method is used for identifying elastic fibers in tissues such as skin, aorta, etc. The elastic fibers will be stained blue-black and background will be stained yellow.