Cobalt
#1B3A74 · Cobalt
#1B3A74 is Cobalt, a cool blue color. It has an RGB value of 27, 58, 116 and a relative luminance of 0.045, 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
11.03:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
1.90:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #1B3A74?
#1B3A74 is Cobalt, a cool blue color. In RGB it is 27, 58, 116, and in HSL it is 219°, 62%, 28%.
Is #1B3A74 a light or dark color?
#1B3A74 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 #1B3A74?
Its complementary color is #74551B. For softer combinations, try the analogous or split-complementary harmonies shown above.