The hex color #667FDA is a light color. The web-safe version is Hex
#6666CC. A complementary color is
#998025. The grayscale version is
#959595. A 20% lighter version of the original color is
#99B2FF, and Hex
#334CA7 is the 20% darker color. If the color is saturated by 10%, you get
#617DE1. If the color is desaturated by 10%, the color
#6B81D3 is obtained.