Indigo
#1F37EF · Indigo
#1F37EF is Indigo, a cool blue color. It has an RGB value of 31, 55, 239 and a relative luminance of 0.093, making it a dark surface.
Temperature
❄ Cool
Hue family
blue
Luminance
0.09
Conversions
HEX
RGB
HSL
HSV
CMYK
OKLCHPro
Contrast & accessibility
On white
The quick fox
7.37:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
2.85:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Analogous
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #1F37EF?
#1F37EF is Indigo, a cool blue color. In RGB it is 31, 55, 239, and in HSL it is 233°, 87%, 53%.
Is #1F37EF a light or dark color?
#1F37EF has a relative luminance of 0.093, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #1F37EF?
Its complementary color is #EFD71F. For softer combinations, try the analogous or split-complementary harmonies shown above.