Charcoal
#660018 · Charcoal
#660018 is Charcoal, a warm red color. It has an RGB value of 102, 0, 24 and a relative luminance of 0.029, making it a dark surface.
Temperature
☀ Warm
Hue family
red
Luminance
0.03
Conversions
HEX
RGB
HSL
HSV
CMYK
OKLCHPro
Contrast & accessibility
On white
The quick fox
13.31:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
1.58:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #660018?
#660018 is Charcoal, a warm red color. In RGB it is 102, 0, 24, and in HSL it is 346°, 100%, 20%.
Is #660018 a light or dark color?
#660018 has a relative luminance of 0.029, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #660018?
Its complementary color is #00664E. For softer combinations, try the analogous or split-complementary harmonies shown above.