The hex color #1a2c3a is a dark color. The web-safe version is Hex
#333333. A complementary color is
#E5D3C5. The grayscale version is
#2B2B2B. A 20% lighter version of the original color is
#4D5F6D, and Hex
#000007 is the 20% darker color. If the color is saturated by 10%, you get
#182C3C. If the color is desaturated by 10%, the color
#1C2C38 is obtained.