#1B511B#1B511B

#1B511B is a dark, moderate green. Relative luminance 0.062; OKLCH L 38.6% C 0.102 H 143.3°. Best body text is #FFFFFF at 9.38:1 contrast (WCAG AA passes).

Color values

HEX	#1B511B
RGB	rgb(27, 81, 27)
HSL	hsl(120, 50%, 21%)
HSV	hsv(120, 67%, 32%)
CMYK	cmyk(66.7%, 0%, 66.7%, 68.2%)
CIE-LAB	lab(29.90, -30.07, 25.99)
CIE-LCH	lch(29.90, 39.75, 139.16°)
OKLab	oklab(38.57% -0.0817 0.0609)
OKLCH	oklch(38.57% 0.102 143.3)
XYZ	xyz(3.5921, 6.1967, 2.0435)
Luminance	0.0620 (WCAG relative)
Temperature	neutral
Family	green

Closest named colors

British Racing Green

#05480D

ΔE00 3.28

Forest Green (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B511B #511B51

analogous

#36511B #1B511B #1B5136

triadic

#1B511B #1B1B51 #511B1B

tetradic

#1B511B #1B3651 #511B51 #51361B

square

#1B511B #1B3651 #511B51 #51361B

split-complementary

#1B511B #361B51 #511B36

monochromatic

#081708 #0C230C #1B511B #2A7F2A #3AAD3A

Accessibility & contrast

On white

9.38

#1B511B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#1B511B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B511B

9.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B511B	#FFFFFF	#000000	##FFFFFF
##1B511B	1.00	9.38	2.24	9.38
#FFFFFF	9.38	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#534915

Deuteranopia (green-blind)

#4C451F

Tritanopia (blue-blind)

#114F45

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1b511b;
/* rgb */ color: rgb(27, 81, 27);
/* oklch */ color: oklch(38.6% 0.102 143.3);

Tailwind

colors: {
  custom: {
    50: '#5f8259',
    500: '#1b511b',
    950: '#000000',
  },
}

SCSS

$custom: #1b511b;
$custom-light: #5f8259;
$custom-dark: #000000;

JSON

{
  "hex": "#1b511b",
  "rgb": {
    "r": 27,
    "g": 81,
    "b": 27
  },
  "hsl": {
    "h": 120,
    "s": 50,
    "l": 21.176
  },
  "oklch": {
    "l": 0.38568,
    "c": 0.1019,
    "h": 143.3
  },
  "luminance": 0.06197
}

Semantic roles & 50–950 ramp

primary

#1B511B

secondary

#874187

accent

#4EDADA

background

#F5F8F5

surface

#EAEFE9

border

#C6CAC5

text

#050A04

muted

#797C79

Preview Lab

Preview with #1B511B

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

Preview Lab → · Contrast checker → · Palette generator →