Indigo
#3731DD · Indigo
#3731DD is Indigo, a cool blue color. It has an RGB value of 55, 49, 221 and a relative luminance of 0.082, making it a dark surface.
Temperature
❄ Cool
Hue family
blue
Luminance
0.08
Conversions
HEX
RGB
HSL
HSV
CMYK
OKLCHPro
Contrast & accessibility
On white
The quick fox
7.94:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
2.65:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #3731DD?
#3731DD is Indigo, a cool blue color. In RGB it is 55, 49, 221, and in HSL it is 242°, 72%, 53%.
Is #3731DD a light or dark color?
#3731DD has a relative luminance of 0.082, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #3731DD?
Its complementary color is #D8DD31. For softer combinations, try the analogous or split-complementary harmonies shown above.