#1F400B#1F400B

#1F400B is a dark, moderate yellow-green. Relative luminance 0.040; OKLCH L 33.4% C 0.088 H 136.3°. Best body text is #FFFFFF at 11.69:1 contrast (WCAG AA passes).

Color values

HEX	#1F400B
RGB	rgb(31, 64, 11)
HSL	hsl(97, 71%, 15%)
HSV	hsv(97, 83%, 25%)
CMYK	cmyk(51.6%, 0%, 82.8%, 74.9%)
CIE-LAB	lab(23.61, -22.87, 27.04)
CIE-LCH	lch(23.61, 35.41, 130.22°)
OKLab	oklab(33.39% -0.0636 0.0609)
OKLCH	oklch(33.39% 0.088 136.3)
XYZ	xyz(2.4588, 3.9821, 0.9556)
Luminance	0.0398 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Forrest Green

#154406

ΔE00 2.61

Hunter Green (survey)

#0B4008

ΔE00 3.05

Forest Green (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F400B #2C0B40

analogous

#3A400B #1F400B #0B4011

triadic

#1F400B #0B1F40 #400B1F

tetradic

#1F400B #0B3A40 #2C0B40 #40110B

square

#1F400B #0B3A40 #2C0B40 #40110B

split-complementary

#1F400B #110B40 #400B3A

monochromatic

#0D1A04 #0D1A04 #1F400B #387414 #52A81D

Accessibility & contrast

On white

11.69

#1F400B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#1F400B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F400B

11.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F400B	#FFFFFF	#000000	##FFFFFF
##1F400B	1.00	11.69	1.80	11.69
#FFFFFF	11.69	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#433A03

Deuteranopia (green-blind)

#3E3710

Tritanopia (blue-blind)

#1E3D36

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1f400b;
/* rgb */ color: rgb(31, 64, 11);
/* oklch */ color: oklch(33.4% 0.088 136.3);

Tailwind

colors: {
  custom: {
    50: '#5e754e',
    500: '#1f400b',
    950: '#000000',
  },
}

SCSS

$custom: #1f400b;
$custom-light: #5e754e;
$custom-dark: #000000;

JSON

{
  "hex": "#1f400b",
  "rgb": {
    "r": 31,
    "g": 64,
    "b": 11
  },
  "hsl": {
    "h": 97.358,
    "s": 70.667,
    "l": 14.706
  },
  "oklch": {
    "l": 0.33385,
    "c": 0.08804,
    "h": 136.3
  },
  "luminance": 0.03982
}

Semantic roles & 50–950 ramp

primary

#1F400B

secondary

#5E2A7D

accent

#3AEDAA

background

#F5F7F4

surface

#E9EDE7

border

#C5C8C3

text

#050802

muted

#797B78

Preview Lab

Preview with #1F400B

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

Preview Lab → · Contrast checker → · Palette generator →