The hex color #266ccc is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#D99333. The grayscale version is
#757575. A 20% lighter version of the original color is
#599FFF, and Hex
#003999 is the 20% darker color. If the color is saturated by 10%, you get
#1E6BD5. If the color is desaturated by 10%, the color
#2E6DC3 is obtained.