The hex color #367ef3 is a dark color. The web-safe version is Hex
#3366FF. A complementary color is
#C9810C. The grayscale version is
#8D8D8D. A 20% lighter version of the original color is
#69B1FF, and Hex
#034BC0 is the 20% darker color. If the color is saturated by 10%, you get
#2D7DFD. If the color is desaturated by 10%, the color
#3F80E9 is obtained.