The hex color #1c83cf is a dark color. The web-safe version is Hex
#3399CC. A complementary color is
#E37C30. The grayscale version is
#7A7A7A. A 20% lighter version of the original color is
#4FB6FF, and Hex
#00509C is the 20% darker color. If the color is saturated by 10%, you get
#1384D8. If the color is desaturated by 10%, the color
#2582C7 is obtained.