The hex color #1a90eb is a dark color. The web-safe version is Hex
#3399FF. A complementary color is
#E56F14. The grayscale version is
#878787. A 20% lighter version of the original color is
#4DC3FF, and Hex
#005DB8 is the 20% darker color. If the color is saturated by 10%, you get
#0F91F5. If the color is desaturated by 10%, the color
#258FE1 is obtained.