The hex color #2951a8 is a dark color. The web-safe version is Hex
#336699. A complementary color is
#D6AE57. The grayscale version is
#616161. A 20% lighter version of the original color is
#5C84DB, and Hex
#001E75 is the 20% darker color. If the color is saturated by 10%, you get
#234FAF. If the color is desaturated by 10%, the color
#2F53A1 is obtained.