#155B51#155B51

#155B51 is a dark, moderate teal. Relative luminance 0.082; OKLCH L 42.6% C 0.069 H 181.1°. Best body text is #FFFFFF at 7.93:1 contrast (WCAG AA passes).

Color values

HEX	#155B51
RGB	rgb(21, 91, 81)
HSL	hsl(171, 63%, 22%)
HSV	hsv(171, 77%, 36%)
CMYK	cmyk(76.9%, 0%, 11%, 64.3%)
CIE-LAB	lab(34.47, -23.73, -0.37)
CIE-LCH	lch(34.47, 23.73, 180.89°)
OKLab	oklab(42.64% -0.0689 -0.0014)
OKLCH	oklch(42.64% 0.069 181.1)
XYZ	xyz(5.5348, 8.2350, 9.0808)
Luminance	0.0824 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#155B51 #5B151F

analogous

#155B2E #155B51 #15425B

triadic

#155B51 #51155B #5B5115

tetradic

#155B51 #2E155B #5B151F #425B15

square

#155B51 #2E155B #5B151F #425B15

split-complementary

#155B51 #5B1542 #5B2E15

monochromatic

#061916 #0A2925 #155B51 #208D7D #2CBEAA

Accessibility & contrast

On white

7.93

#155B51 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.65

#155B51 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #155B51

7.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##155B51	#FFFFFF	#000000	##FFFFFF
##155B51	1.00	7.93	2.65	7.93
#FFFFFF	7.93	1.00	21.00	1.00
#000000	2.65	21.00	1.00	21.00
##FFFFFF	7.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#575551

Deuteranopia (green-blind)

#4D4E52

Tritanopia (blue-blind)

#005D58

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #155b51;
/* rgb */ color: rgb(21, 91, 81);
/* oklch */ color: oklch(42.6% 0.069 181.1);

Tailwind

colors: {
  custom: {
    50: '#5f8a81',
    500: '#155b51',
    950: '#000000',
  },
}

SCSS

$custom: #155b51;
$custom-light: #5f8a81;
$custom-dark: #000000;

JSON

{
  "hex": "#155b51",
  "rgb": {
    "r": 21,
    "g": 91,
    "b": 81
  },
  "hsl": {
    "h": 171.429,
    "s": 62.5,
    "l": 21.961
  },
  "oklch": {
    "l": 0.42644,
    "c": 0.06896,
    "h": 181.1
  },
  "luminance": 0.08236
}

Semantic roles & 50–950 ramp

primary

#155B51

secondary

#923946

accent

#425AE6

background

#F5F8F7

surface

#EAF0EE

border

#C6CBC9

text

#050B0A

muted

#797C7C

Preview Lab

Preview with #155B51

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

Preview Lab → · Contrast checker → · Palette generator →