Cobalt
#305FB5 · Cobalt
#305FB5 is Cobalt, a cool blue color. It has an RGB value of 48, 95, 181 and a relative luminance of 0.121, making it a dark surface.
Temperature
❄ Cool
Hue family
blue
Luminance
0.12
Conversions
HEX
RGB
HSL
HSV
CMYK
OKLCHPro
Contrast & accessibility
On white
The quick fox
6.12:1
AA normal✓
AA large✓
AAA normal✕
On black
The quick fox
3.43:1
AA normal✕
AA large✓
AAA normal✕
Color harmonies
Complementary
Analogous
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #305FB5?
#305FB5 is Cobalt, a cool blue color. In RGB it is 48, 95, 181, and in HSL it is 219°, 58%, 45%.
Is #305FB5 a light or dark color?
#305FB5 has a relative luminance of 0.121, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #305FB5?
Its complementary color is #B58730. For softer combinations, try the analogous or split-complementary harmonies shown above.