Cobalt
#0B3784 · Cobalt
#0B3784 is Cobalt, a cool blue color. It has an RGB value of 11, 55, 132 and a relative luminance of 0.045, making it a dark surface.
Temperature
❄ Cool
Hue family
blue
Luminance
0.04
Conversions
HEX
RGB
HSL
HSV
CMYK
OKLCHPro
Contrast & accessibility
On white
The quick fox
11.09:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
1.89:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #0B3784?
#0B3784 is Cobalt, a cool blue color. In RGB it is 11, 55, 132, and in HSL it is 218°, 85%, 28%.
Is #0B3784 a light or dark color?
#0B3784 has a relative luminance of 0.045, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #0B3784?
Its complementary color is #84580B. For softer combinations, try the analogous or split-complementary harmonies shown above.