The hex color #2b51ff is a dark color. The web-safe version is Hex
#3366FF. A complementary color is
#D4AE00. The grayscale version is
#7E7E7E. A 20% lighter version of the original color is
#5E84FF, and Hex
#001ECC is the 20% darker color. If the color is saturated by 10%, you get
#234CFF. If the color is desaturated by 10%, the color
#3356F2 is obtained.