Cobalt
#1233AB · Cobalt
#1233AB is Cobalt, a cool blue color. It has an RGB value of 18, 51, 171 and a relative luminance of 0.054, 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
10.06:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
2.09:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #1233AB?
#1233AB is Cobalt, a cool blue color. In RGB it is 18, 51, 171, and in HSL it is 227°, 81%, 37%.
Is #1233AB a light or dark color?
#1233AB has a relative luminance of 0.054, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #1233AB?
Its complementary color is #AB8A12. For softer combinations, try the analogous or split-complementary harmonies shown above.