Cobalt
#173FA6 · Cobalt
#173FA6 is Cobalt, a cool blue color. It has an RGB value of 23, 63, 166 and a relative luminance of 0.065, 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
9.14:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
2.30:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #173FA6?
#173FA6 is Cobalt, a cool blue color. In RGB it is 23, 63, 166, and in HSL it is 223°, 76%, 37%.
Is #173FA6 a light or dark color?
#173FA6 has a relative luminance of 0.065, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #173FA6?
Its complementary color is #A67D17. For softer combinations, try the analogous or split-complementary harmonies shown above.