Charcoal
#40404F · Charcoal
#40404F is Charcoal, a cool blue color. It has an RGB value of 64, 64, 79 and a relative luminance of 0.053, 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
10.17:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
2.06:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #40404F?
#40404F is Charcoal, a cool blue color. In RGB it is 64, 64, 79, and in HSL it is 240°, 10%, 28%.
Is #40404F a light or dark color?
#40404F has a relative luminance of 0.053, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #40404F?
Its complementary color is #4F4F40. For softer combinations, try the analogous or split-complementary harmonies shown above.