The hex color #436FD2 is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#BC902D. The grayscale version is
#818181. A 20% lighter version of the original color is
#76A2FF, and Hex
#103C9F is the 20% darker color. If the color is saturated by 10%, you get
#3D6DDA. If the color is desaturated by 10%, the color
#4971CA is obtained.