Difference Between Orange and Blue Indicating Silica Gel. Ideal for Silica Gel Pouch and Packet. Silica Gel Breather is made from the finest quality raw material of Orange Silica Gel. It appears orange in color. It is also known as self Indicating Type Silica gel because When free from moisture the particles are dark orange. This form of silica gel includes an orange Color that can eventually turn dark green to show when the silica gel.