Sky
#309BB5 · Sky
#309BB5 is Sky, a cool cyan color. It has an RGB value of 48, 155, 181 and a relative luminance of 0.274, making it a dark surface.
Temperature
❄ Cool
Hue family
cyan
Luminance
0.27
Conversions
HEX
RGB
HSL
HSV
CMYK
OKLCHPro
Contrast & accessibility
On white
The quick fox
3.24:1
AA normal✕
AA large✓
AAA normal✕
On black
The quick fox
6.48:1
AA normal✓
AA large✓
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #309BB5?
#309BB5 is Sky, a cool cyan color. In RGB it is 48, 155, 181, and in HSL it is 192°, 58%, 45%.
Is #309BB5 a light or dark color?
#309BB5 has a relative luminance of 0.274, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #309BB5?
Its complementary color is #B54B30. For softer combinations, try the analogous or split-complementary harmonies shown above.