The hex color #2d15d7 is a dark color. The web-safe version is Hex
#3300CC. A complementary color is
#D2EA28. The grayscale version is
#5E5E5E. A 20% lighter version of the original color is
#6048FF, and Hex
#0000A4 is the 20% darker color. If the color is saturated by 10%, you get
#280EE3. If the color is desaturated by 10%, the color
#321CCB is obtained.