The hex color #356dd1 is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#CA922E. The grayscale version is
#7C7C7C. A 20% lighter version of the original color is
#68A0FF, and Hex
#023A9E is the 20% darker color. If the color is saturated by 10%, you get
#2E6CDA. If the color is desaturated by 10%, the color
#3C6EC8 is obtained.