Signal Cyan
#15B5F9 · Signal Cyan
#15B5F9 is Signal Cyan, a cool cyan color. It has an RGB value of 21, 181, 249 and a relative luminance of 0.400, making it a dark surface.
Temperature
❄ Cool
Hue family
cyan
Luminance
0.40
Conversions
HEX
RGB
HSL
HSV
CMYK
OKLCHPro
Contrast & accessibility
On white
The quick fox
2.33:1
AA normal✕
AA large✕
AAA normal✕
On black
The quick fox
9.01:1
AA normal✓
AA large✓
AAA normal✓
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #15B5F9?
#15B5F9 is Signal Cyan, a cool cyan color. In RGB it is 21, 181, 249, and in HSL it is 198°, 95%, 53%.
Is #15B5F9 a light or dark color?
#15B5F9 has a relative luminance of 0.400, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #15B5F9?
Its complementary color is #F95A15. For softer combinations, try the analogous or split-complementary harmonies shown above.