Cobalt
#1818CD · Cobalt
#1818CD is Cobalt, a cool blue color. It has an RGB value of 24, 24, 205 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
10.24:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
2.05:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #1818CD?
#1818CD is Cobalt, a cool blue color. In RGB it is 24, 24, 205, and in HSL it is 240°, 79%, 45%.
Is #1818CD a light or dark color?
#1818CD 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 #1818CD?
Its complementary color is #CDCD18. For softer combinations, try the analogous or split-complementary harmonies shown above.