Indigo
#366DD3 · Indigo
#366DD3 is Indigo, a cool blue color. It has an RGB value of 54, 109, 211 and a relative luminance of 0.164, making it a dark surface.
Temperature
❄ Cool
Hue family
blue
Luminance
0.16
Conversions
HEX
RGB
HSL
HSV
CMYK
OKLCHPro
Contrast & accessibility
On white
The quick fox
4.90:1
AA normal✓
AA large✓
AAA normal✕
On black
The quick fox
4.28:1
AA normal✕
AA large✓
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #366DD3?
#366DD3 is Indigo, a cool blue color. In RGB it is 54, 109, 211, and in HSL it is 219°, 64%, 52%.
Is #366DD3 a light or dark color?
#366DD3 has a relative luminance of 0.164, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #366DD3?
Its complementary color is #D39C36. For softer combinations, try the analogous or split-complementary harmonies shown above.