#155B78#155B78

#155B78 is a dark, moderate cyan. Relative luminance 0.090; OKLCH L 44.4% C 0.081 H 231.1°. Best body text is #FFFFFF at 7.50:1 contrast (WCAG AA passes).

Color values

HEX#155B78
RGBrgb(21, 91, 120)
HSLhsl(198, 70%, 28%)
HSVhsv(198, 83%, 47%)
CMYKcmyk(82.5%, 24.2%, 0%, 52.9%)
CIE-LABlab(35.98, -10.17, -22.36)
CIE-LCHlch(35.98, 24.56, 245.55°)
OKLaboklab(44.36% -0.0509 -0.063)
OKLCHoklch(44.36% 0.081 231.1)
XYZxyz(7.4391, 8.9968, 19.1101)
Luminance0.0900 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#155B78 #783215
analogous
#157864 #155B78 #152978
triadic
#155B78 #78155B #5B7815
tetradic
#155B78 #641578 #783215 #297815
square
#155B78 #641578 #783215 #297815
split-complementary
#155B78 #781529 #786415
monochromatic
#05141A #0C3444 #155B78 #1E82AC #2DA8DA

Accessibility & contrast

On white

7.50
#155B78 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.80
#155B78 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #155B78
7.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##155B78#FFFFFF#000000##FFFFFF
##155B781.007.502.807.50
#FFFFFF7.501.0021.001.00
#0000002.8021.001.0021.00
##FFFFFF7.501.0021.001.00

Color blindness preview

Protanopia (red-blind)
#4C5A79
Deuteranopia (green-blind)
#3F5178
Tritanopia (blue-blind)
#006365
Achromatopsia (no color)
#555555

Design tokens & code

CSS
--color: #155b78;
/* rgb */ color: rgb(21, 91, 120);
/* oklch */ color: oklch(44.4% 0.081 231.1);
Tailwind
colors: {
  custom: {
    50: '#64899f',
    500: '#155b78',
    950: '#000000',
  },
}
SCSS
$custom: #155b78;
$custom-light: #64899f;
$custom-dark: #000000;
JSON
{
  "hex": "#155b78",
  "rgb": {
    "r": 21,
    "g": 91,
    "b": 120
  },
  "hsl": {
    "h": 197.576,
    "s": 70.213,
    "l": 27.647
  },
  "oklch": {
    "l": 0.44363,
    "c": 0.08094,
    "h": 231.1
  },
  "luminance": 0.08998
}

Semantic roles & 50–950 ramp

primary
#155B78
secondary
#AE5D3B
accent
#6F3BED
background
#F6F8F9
surface
#EBF0F2
border
#C6CBCC
text
#060B0E
muted
#7A7C7E

Preview Lab

Preview with #155B78

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →

#155B78 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva