Cobalt
#2857BD · Cobalt
#2857BD is Cobalt, a cool blue color. It has an RGB value of 40, 87, 189 and a relative luminance of 0.109, making it a dark surface.
Temperature
❄ Cool
Hue family
blue
Luminance
0.11
Conversions
HEX
RGB
HSL
HSV
CMYK
OKLCHPro
Contrast & accessibility
On white
The quick fox
6.59:1
AA normal✓
AA large✓
AAA normal✕
On black
The quick fox
3.19:1
AA normal✕
AA large✓
AAA normal✕
Color harmonies
Complementary
Analogous
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #2857BD?
#2857BD is Cobalt, a cool blue color. In RGB it is 40, 87, 189, and in HSL it is 221°, 65%, 45%.
Is #2857BD a light or dark color?
#2857BD has a relative luminance of 0.109, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #2857BD?
Its complementary color is #BD8E28. For softer combinations, try the analogous or split-complementary harmonies shown above.