The hex color #1a15d5 is a dark color. The web-safe version is Hex
#3300CC. A complementary color is
#E5EA2A. The grayscale version is
#575757. A 20% lighter version of the original color is
#4D48FF, and Hex
#0000A2 is the 20% darker color. If the color is saturated by 10%, you get
#140EE2. If the color is desaturated by 10%, the color
#201CC8 is obtained.