Cobalt
#231ACB · Cobalt
#231ACB is Cobalt, a cool blue color. It has an RGB value of 35, 26, 203 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
10.09:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
2.08:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #231ACB?
#231ACB is Cobalt, a cool blue color. In RGB it is 35, 26, 203, and in HSL it is 243°, 77%, 45%.
Is #231ACB a light or dark color?
#231ACB 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 #231ACB?
Its complementary color is #C2CB1A. For softer combinations, try the analogous or split-complementary harmonies shown above.