The hex color #434fdd is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#BCB022. The grayscale version is
#7A7A7A. A 20% lighter version of the original color is
#7682FF, and Hex
#101CAA is the 20% darker color. If the color is saturated by 10%, you get
#3D4BE7. If the color is desaturated by 10%, the color
#4953D3 is obtained.