The hex color #37a9cb is a light color. The web-safe version is Hex
#3399CC. A complementary color is
#C85634. The grayscale version is
#8E8E8E. A 20% lighter version of the original color is
#6ADCFE, and Hex
#047698 is the 20% darker color. If the color is saturated by 10%, you get
#2EACD1. If the color is desaturated by 10%, the color
#40A6C5 is obtained.