Cobalt
#511BA1 · Cobalt
#511BA1 is Cobalt, a cool violet color. It has an RGB value of 81, 27, 161 and a relative luminance of 0.051, making it a dark surface.
Temperature
❄ Cool
Hue family
violet
Luminance
0.05
Conversions
HEX
RGB
HSL
HSV
CMYK
OKLCHPro
Contrast & accessibility
On white
The quick fox
10.39:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
2.02:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #511BA1?
#511BA1 is Cobalt, a cool violet color. In RGB it is 81, 27, 161, and in HSL it is 264°, 71%, 37%.
Is #511BA1 a light or dark color?
#511BA1 has a relative luminance of 0.051, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #511BA1?
Its complementary color is #6CA11B. For softer combinations, try the analogous or split-complementary harmonies shown above.