Cobalt
#1D39C9 · Cobalt
#1D39C9 is Cobalt, a cool blue color. It has an RGB value of 29, 57, 201 and a relative luminance of 0.074, making it a dark surface.
Temperature
❄ Cool
Hue family
blue
Luminance
0.07
Conversions
HEX
RGB
HSL
HSV
CMYK
OKLCHPro
Contrast & accessibility
On white
The quick fox
8.46:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
2.48:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #1D39C9?
#1D39C9 is Cobalt, a cool blue color. In RGB it is 29, 57, 201, and in HSL it is 230°, 75%, 45%.
Is #1D39C9 a light or dark color?
#1D39C9 has a relative luminance of 0.074, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #1D39C9?
Its complementary color is #C9AC1D. For softer combinations, try the analogous or split-complementary harmonies shown above.