Cobalt
#12397D · Cobalt
#12397D is Cobalt, a cool blue color. It has an RGB value of 18, 57, 125 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
11.01:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
1.91:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #12397D?
#12397D is Cobalt, a cool blue color. In RGB it is 18, 57, 125, and in HSL it is 218°, 75%, 28%.
Is #12397D a light or dark color?
#12397D 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 #12397D?
Its complementary color is #7D5612. For softer combinations, try the analogous or split-complementary harmonies shown above.