Lagoon
#21B9C4 · Lagoon
#21B9C4 is Lagoon, a cool cyan color. It has an RGB value of 33, 185, 196 and a relative luminance of 0.390, making it a dark surface.
Temperature
❄ Cool
Hue family
cyan
Luminance
0.39
Conversions
HEX
RGB
HSL
HSV
CMYK
OKLCHPro
Contrast & accessibility
On white
The quick fox
2.39:1
AA normal✕
AA large✕
AAA normal✕
On black
The quick fox
8.80:1
AA normal✓
AA large✓
AAA normal✓
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #21B9C4?
#21B9C4 is Lagoon, a cool cyan color. In RGB it is 33, 185, 196, and in HSL it is 184°, 71%, 45%.
Is #21B9C4 a light or dark color?
#21B9C4 has a relative luminance of 0.390, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #21B9C4?
Its complementary color is #C42C21. For softer combinations, try the analogous or split-complementary harmonies shown above.