Indigo
#3F57CF · Indigo
#3F57CF is Indigo, a cool blue color. It has an RGB value of 63, 87, 207 and a relative luminance of 0.124, making it a dark surface.
Temperature
❄ Cool
Hue family
blue
Luminance
0.12
Conversions
HEX
RGB
HSL
HSV
CMYK
OKLCHPro
Contrast & accessibility
On white
The quick fox
6.04:1
AA normal✓
AA large✓
AAA normal✕
On black
The quick fox
3.48:1
AA normal✕
AA large✓
AAA normal✕
Color harmonies
Complementary
Analogous
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #3F57CF?
#3F57CF is Indigo, a cool blue color. In RGB it is 63, 87, 207, and in HSL it is 230°, 60%, 53%.
Is #3F57CF a light or dark color?
#3F57CF has a relative luminance of 0.124, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #3F57CF?
Its complementary color is #CFB73F. For softer combinations, try the analogous or split-complementary harmonies shown above.