Cobalt
#0B3583 · Cobalt
#0B3583 is Cobalt, a cool blue color. It has an RGB value of 11, 53, 131 and a relative luminance of 0.043, 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
11.34:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
1.85:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #0B3583?
#0B3583 is Cobalt, a cool blue color. In RGB it is 11, 53, 131, and in HSL it is 219°, 85%, 28%.
Is #0B3583 a light or dark color?
#0B3583 has a relative luminance of 0.043, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #0B3583?
Its complementary color is #845A0B. For softer combinations, try the analogous or split-complementary harmonies shown above.