Cobalt
#183B77 · Cobalt
#183B77 is Cobalt, a cool blue color. It has an RGB value of 24, 59, 119 and a relative luminance of 0.047, making it a dark surface.
Temperature
❄ Cool
Hue family
blue
Luminance
0.05
Conversions
HEX
RGB
HSL
HSV
CMYK
OKLCHPro
Contrast & accessibility
On white
The quick fox
10.88:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
1.93:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #183B77?
#183B77 is Cobalt, a cool blue color. In RGB it is 24, 59, 119, and in HSL it is 218°, 66%, 28%.
Is #183B77 a light or dark color?
#183B77 has a relative luminance of 0.047, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #183B77?
Its complementary color is #775418. For softer combinations, try the analogous or split-complementary harmonies shown above.