Cobalt
#2509DC · Cobalt
#2509DC is Cobalt, a cool blue color. It has an RGB value of 37, 9, 220 and a relative luminance of 0.058, making it a dark surface.
Temperature
❄ Cool
Hue family
blue
Luminance
0.06
Conversions
HEX
RGB
HSL
HSV
CMYK
OKLCHPro
Contrast & accessibility
On white
The quick fox
9.76:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
2.15:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #2509DC?
#2509DC is Cobalt, a cool blue color. In RGB it is 37, 9, 220, and in HSL it is 248°, 92%, 45%.
Is #2509DC a light or dark color?
#2509DC has a relative luminance of 0.058, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #2509DC?
Its complementary color is #C0DC09. For softer combinations, try the analogous or split-complementary harmonies shown above.