Cobalt
#0042BD · Cobalt
#0042BD is Cobalt, a cool blue color. It has an RGB value of 0, 66, 189 and a relative luminance of 0.076, making it a dark surface.
Temperature
❄ Cool
Hue family
blue
Luminance
0.08
Conversions
HEX
RGB
HSL
HSV
CMYK
OKLCHPro
Contrast & accessibility
On white
The quick fox
8.35:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
2.51:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Analogous
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #0042BD?
#0042BD is Cobalt, a cool blue color. In RGB it is 0, 66, 189, and in HSL it is 219°, 100%, 37%.
Is #0042BD a light or dark color?
#0042BD has a relative luminance of 0.076, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #0042BD?
Its complementary color is #BD7B00. For softer combinations, try the analogous or split-complementary harmonies shown above.