The hex color #619e8f is a light color. The web-safe version is Hex
#669999. A complementary color is
#9E6170. The grayscale version is
#858585. A 20% lighter version of the original color is
#94D1C2, and Hex
#2E6B5C is the 20% darker color. If the color is saturated by 10%, you get
#5DA190. If the color is desaturated by 10%, the color
#659B8E is obtained.