The hex color #266efc is a dark color. The web-safe version is Hex
#3366FF. A complementary color is
#D99103. The grayscale version is
#858585. A 20% lighter version of the original color is
#59A1FF, and Hex
#003BC9 is the 20% darker color. If the color is saturated by 10%, you get
#1C6CFF. If the color is desaturated by 10%, the color
#3070F0 is obtained.