#51891B#51891B

#51891B is a mid, vivid yellow-green. Relative luminance 0.197; OKLCH L 57.0% C 0.149 H 133.5°. Best body text is #000000 at 4.94:1 contrast (WCAG AA passes).

Color values

HEX	#51891B
RGB	rgb(81, 137, 27)
HSL	hsl(91, 67%, 32%)
HSV	hsv(91, 80%, 54%)
CMYK	cmyk(40.9%, 0%, 80.3%, 46.3%)
CIE-LAB	lab(51.52, -36.51, 48.93)
CIE-LCH	lch(51.52, 61.05, 126.73°)
OKLab	oklab(56.98% -0.1028 0.1084)
OKLCH	oklch(56.98% 0.149 133.5)
XYZ	xyz(12.5366, 19.7192, 4.1823)
Luminance	0.1972 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51891B #531B89

analogous

#88891B #51891B #1B891C

triadic

#51891B #1B5189 #891B51

tetradic

#51891B #1B8889 #531B89 #891C1B

square

#51891B #1B8889 #531B89 #891C1B

split-complementary

#51891B #1C1B89 #891B88

monochromatic

#152307 #335611 #51891B #6FBC25 #8EDA44

Accessibility & contrast

On white

4.25

#51891B on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.94

#51891B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #51891B

4.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51891B	#FFFFFF	#000000	##000000
##51891B	1.00	4.25	4.94	4.94
#FFFFFF	4.25	1.00	21.00	21.00
#000000	4.94	21.00	1.00	1.00
##000000	4.94	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8F7E00

Deuteranopia (green-blind)

#877927

Tritanopia (blue-blind)

#518375

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #51891b;
/* rgb */ color: rgb(81, 137, 27);
/* oklch */ color: oklch(57.0% 0.149 133.5);

Tailwind

colors: {
  custom: {
    50: '#87ac61',
    500: '#51891b',
    950: '#000000',
  },
}

SCSS

$custom: #51891b;
$custom-light: #87ac61;
$custom-dark: #000000;

JSON

{
  "hex": "#51891b",
  "rgb": {
    "r": 81,
    "g": 137,
    "b": 27
  },
  "hsl": {
    "h": 90.545,
    "s": 67.073,
    "l": 32.157
  },
  "oklch": {
    "l": 0.56984,
    "c": 0.14937,
    "h": 133.5
  },
  "luminance": 0.1972
}

Semantic roles & 50–950 ramp

primary

#51891B

secondary

#8144BC

accent

#3EEA95

background

#F8FAF6

surface

#F0F4EB

border

#CBCEC6

text

#0C1005

muted

#7D7F7A

Preview Lab

Preview with #51891B

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

Preview Lab → · Contrast checker → · Palette generator →