Cobalt
#153C7A · Cobalt
#153C7A is Cobalt, a cool blue color. It has an RGB value of 21, 60, 122 and a relative luminance of 0.048, 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
10.72:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
1.96:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #153C7A?
#153C7A is Cobalt, a cool blue color. In RGB it is 21, 60, 122, and in HSL it is 217°, 71%, 28%.
Is #153C7A a light or dark color?
#153C7A has a relative luminance of 0.048, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #153C7A?
Its complementary color is #7A5315. For softer combinations, try the analogous or split-complementary harmonies shown above.