Cobalt
#0A3AB2 · Cobalt
#0A3AB2 is Cobalt, a cool blue color. It has an RGB value of 10, 58, 178 and a relative luminance of 0.063, making it a dark surface.
Temperature
❄ Cool
Hue family
blue
Luminance
0.06
Conversions
HEX
RGB
HSL
HSV
CMYK
OKLCHPro
Contrast & accessibility
On white
The quick fox
9.29:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
2.26:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #0A3AB2?
#0A3AB2 is Cobalt, a cool blue color. In RGB it is 10, 58, 178, and in HSL it is 223°, 89%, 37%.
Is #0A3AB2 a light or dark color?
#0A3AB2 has a relative luminance of 0.063, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #0A3AB2?
Its complementary color is #B2830A. For softer combinations, try the analogous or split-complementary harmonies shown above.