Cobalt
#0A3DB2 · Cobalt
#0A3DB2 is Cobalt, a cool blue color. It has an RGB value of 10, 61, 178 and a relative luminance of 0.066, making it a dark surface.
Temperature
❄ Cool
Hue family
blue
Luminance
0.07
Conversions
HEX
RGB
HSL
HSV
CMYK
OKLCHPro
Contrast & accessibility
On white
The quick fox
9.04:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
2.32:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Analogous
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #0A3DB2?
#0A3DB2 is Cobalt, a cool blue color. In RGB it is 10, 61, 178, and in HSL it is 222°, 89%, 37%.
Is #0A3DB2 a light or dark color?
#0A3DB2 has a relative luminance of 0.066, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #0A3DB2?
Its complementary color is #B2800A. For softer combinations, try the analogous or split-complementary harmonies shown above.