The hex color #2f3ee9 is a dark color. The web-safe version is Hex
#3333FF. A complementary color is
#D0C116. The grayscale version is
#727272. A 20% lighter version of the original color is
#6271FF, and Hex
#000BB6 is the 20% darker color. If the color is saturated by 10%, you get
#2839F5. If the color is desaturated by 10%, the color
#3643DD is obtained.