Charcoal
#0B3A5B · Charcoal
#0B3A5B is Charcoal, a cool blue color. It has an RGB value of 11, 58, 91 and a relative luminance of 0.039, 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
11.86:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
1.77:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #0B3A5B?
#0B3A5B is Charcoal, a cool blue color. In RGB it is 11, 58, 91, and in HSL it is 205°, 78%, 20%.
Is #0B3A5B a light or dark color?
#0B3A5B has a relative luminance of 0.039, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #0B3A5B?
Its complementary color is #5B2C0B. For softer combinations, try the analogous or split-complementary harmonies shown above.