Indigo
#155DF9 · Indigo
#155DF9 is Indigo, a cool blue color. It has an RGB value of 21, 93, 249 and a relative luminance of 0.148, making it a dark surface.
Temperature
❄ Cool
Hue family
blue
Luminance
0.15
Conversions
HEX
RGB
HSL
HSV
CMYK
OKLCHPro
Contrast & accessibility
On white
The quick fox
5.30:1
AA normal✓
AA large✓
AAA normal✕
On black
The quick fox
3.97:1
AA normal✕
AA large✓
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #155DF9?
#155DF9 is Indigo, a cool blue color. In RGB it is 21, 93, 249, and in HSL it is 221°, 95%, 53%.
Is #155DF9 a light or dark color?
#155DF9 has a relative luminance of 0.148, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #155DF9?
Its complementary color is #F9B115. For softer combinations, try the analogous or split-complementary harmonies shown above.