Cobalt
#181CA5 · Cobalt
#181CA5 is Cobalt, a cool blue color. It has an RGB value of 24, 28, 165 and a relative luminance of 0.037, 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
12.01:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
1.75:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #181CA5?
#181CA5 is Cobalt, a cool blue color. In RGB it is 24, 28, 165, and in HSL it is 238°, 75%, 37%.
Is #181CA5 a light or dark color?
#181CA5 has a relative luminance of 0.037, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #181CA5?
Its complementary color is #A5A018. For softer combinations, try the analogous or split-complementary harmonies shown above.