Humidity Indicator Cards 5 Pack - 10-60% 6 Spot(5 Cards) Color Changing Humidity Indicator Cards Pack of 5 ( 5 Cards) 6 Dot(10%,20%,30%,40%,50%,60%) As the humidity increases the chemically impregnated spots change from a blue color (DRY) through a pink, to a lavender color (HUMID). READ AT LAVENDER BETWEEN PINK AND BLUE.