The hex color #245B5E is a dark color. The web-safe version is Hex
#336666. A complementary color is
#DBA4A1. The grayscale version is
#4A4A4A. A 20% lighter version of the original color is
#578E91, and Hex
#00282B is the 20% darker color. If the color is saturated by 10%, you get
#205D60. If the color is desaturated by 10%, the color
#28595C is obtained.