#1F310B#1F310B

#1F310B is a dark, moderate yellow-green. Relative luminance 0.025; OKLCH L 28.8% C 0.065 H 131.1°. Best body text is #FFFFFF at 13.98:1 contrast (WCAG AA passes).

Color values

HEX	#1F310B
RGB	rgb(31, 49, 11)
HSL	hsl(88, 63%, 12%)
HSV	hsv(88, 78%, 19%)
CMYK	cmyk(36.7%, 0%, 77.6%, 80.8%)
CIE-LAB	lab(17.97, -15.07, 20.82)
CIE-LCH	lch(17.97, 25.70, 125.89°)
OKLab	oklab(28.78% -0.0424 0.0486)
OKLCH	oklch(28.78% 0.065 131.1)
XYZ	xyz(1.7238, 2.5120, 0.7106)
Luminance	0.0251 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Hunter Green (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F310B #1D0B31

analogous

#31300B #1F310B #0C310B

triadic

#1F310B #0B1F31 #310B1F

tetradic

#1F310B #0B3130 #1D0B31 #310B0C

square

#1F310B #0B3130 #1D0B31 #310B0C

split-complementary

#1F310B #0B0C31 #300B31

monochromatic

#101906 #101906 #1F310B #3F6316 #5E9521

Accessibility & contrast

On white

13.98

#1F310B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.50

#1F310B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F310B

13.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F310B	#FFFFFF	#000000	##FFFFFF
##1F310B	1.00	13.98	1.50	13.98
#FFFFFF	13.98	1.00	21.00	1.00
#000000	1.50	21.00	1.00	21.00
##FFFFFF	13.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#342D07

Deuteranopia (green-blind)

#312B0E

Tritanopia (blue-blind)

#202F29

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #1f310b;
/* rgb */ color: rgb(31, 49, 11);
/* oklch */ color: oklch(28.8% 0.065 131.1);

Tailwind

colors: {
  custom: {
    50: '#5c694c',
    500: '#1f310b',
    950: '#000000',
  },
}

SCSS

$custom: #1f310b;
$custom-light: #5c694c;
$custom-dark: #000000;

JSON

{
  "hex": "#1f310b",
  "rgb": {
    "r": 31,
    "g": 49,
    "b": 11
  },
  "hsl": {
    "h": 88.421,
    "s": 63.333,
    "l": 11.765
  },
  "oklch": {
    "l": 0.28776,
    "c": 0.06451,
    "h": 131.1
  },
  "luminance": 0.02512
}

Semantic roles & 50–950 ramp

primary

#1F310B

secondary

#4A2A6E

accent

#41E690

background

#F5F6F4

surface

#E9EBE7

border

#C5C6C3

text

#040601

muted

#797A77

Preview Lab

Preview with #1F310B

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

Preview Lab → · Contrast checker → · Palette generator →