Cobalt
#100DD9 · Cobalt
#100DD9 is Cobalt, a cool blue color. It has an RGB value of 16, 13, 217 and a relative luminance of 0.054, 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
10.09:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
2.08:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #100DD9?
#100DD9 is Cobalt, a cool blue color. In RGB it is 16, 13, 217, and in HSL it is 241°, 89%, 45%.
Is #100DD9 a light or dark color?
#100DD9 has a relative luminance of 0.054, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #100DD9?
Its complementary color is #D5D90D. For softer combinations, try the analogous or split-complementary harmonies shown above.