Cobalt
#0B2584 · Cobalt
#0B2584 is Cobalt, a cool blue color. It has an RGB value of 11, 37, 132 and a relative luminance of 0.031, making it a dark surface.
Temperature
❄ Cool
Hue family
blue
Luminance
0.03
Conversions
HEX
RGB
HSL
HSV
CMYK
OKLCHPro
Contrast & accessibility
On white
The quick fox
13.03:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
1.61:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #0B2584?
#0B2584 is Cobalt, a cool blue color. In RGB it is 11, 37, 132, and in HSL it is 227°, 85%, 28%.
Is #0B2584 a light or dark color?
#0B2584 has a relative luminance of 0.031, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #0B2584?
Its complementary color is #846A0B. For softer combinations, try the analogous or split-complementary harmonies shown above.