The hex color #437ce7 is a dark color. The web-safe version is Hex
#3366FF. A complementary color is
#BC8318. The grayscale version is
#8D8D8D. A 20% lighter version of the original color is
#76AFFF, and Hex
#1049B4 is the 20% darker color. If the color is saturated by 10%, you get
#3C7AF0. If the color is desaturated by 10%, the color
#4A7EDE is obtained.