Cobalt
#2309B3 · Cobalt
#2309B3 is Cobalt, a cool blue color. It has an RGB value of 35, 9, 179 and a relative luminance of 0.038, making it a dark surface.
Temperature
❄ Cool
Hue family
blue
Luminance
0.04
Conversions
HEX
RGB
HSL
HSV
CMYK
OKLCHPro
Contrast & accessibility
On white
The quick fox
11.92:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
1.76:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #2309B3?
#2309B3 is Cobalt, a cool blue color. In RGB it is 35, 9, 179, and in HSL it is 249°, 90%, 37%.
Is #2309B3 a light or dark color?
#2309B3 has a relative luminance of 0.038, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #2309B3?
Its complementary color is #9AB309. For softer combinations, try the analogous or split-complementary harmonies shown above.