#51B41F#51B41F

#51B41F is a light, vivid yellow-green. Relative luminance 0.345; OKLCH L 68.4% C 0.199 H 138.0°. Best body text is #000000 at 7.90:1 contrast (WCAG AA passes).

Color values

HEX	#51B41F
RGB	rgb(81, 180, 31)
HSL	hsl(100, 71%, 41%)
HSV	hsv(100, 83%, 71%)
CMYK	cmyk(55%, 0%, 82.8%, 29.4%)
CIE-LAB	lab(65.35, -53.44, 60.52)
CIE-LCH	lch(65.35, 80.73, 131.45°)
OKLab	oklab(68.36% -0.148 0.1333)
OKLCH	oklch(68.36% 0.199 138)
XYZ	xyz(19.9612, 34.4892, 6.9013)
Luminance	0.3449 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B41F #821FB4

analogous

#9CB41F #51B41F #1FB438

triadic

#51B41F #1F51B4 #B41F51

tetradic

#51B41F #1F9CB4 #821FB4 #B4381F

square

#51B41F #1F9CB4 #821FB4 #B4381F

split-complementary

#51B41F #381FB4 #B41F9C

monochromatic

#224C0D #3A8016 #51B41F #6CDC34 #92E568

Accessibility & contrast

On white

2.66

#51B41F on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.90

#51B41F on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B41F

7.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B41F	#FFFFFF	#000000	##000000
##51B41F	1.00	2.66	7.90	7.90
#FFFFFF	2.66	1.00	21.00	21.00
#000000	7.90	21.00	1.00	1.00
##000000	7.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BAA400

Deuteranopia (green-blind)

#AD9C32

Tritanopia (blue-blind)

#49AD99

Achromatopsia (no color)

#9F9F9F

Design tokens & code

CSS

--color: #51b41f;
/* rgb */ color: rgb(81, 180, 31);
/* oklch */ color: oklch(68.4% 0.199 138.0);

Tailwind

colors: {
  custom: {
    50: '#8dcb69',
    500: '#51b41f',
    950: '#000000',
  },
}

SCSS

$custom: #51b41f;
$custom-light: #8dcb69;
$custom-dark: #000000;

JSON

{
  "hex": "#51b41f",
  "rgb": {
    "r": 81,
    "g": 180,
    "b": 31
  },
  "hsl": {
    "h": 99.866,
    "s": 70.616,
    "l": 41.373
  },
  "oklch": {
    "l": 0.68364,
    "c": 0.19917,
    "h": 138
  },
  "luminance": 0.34491
}

Semantic roles & 50–950 ramp

primary

#51B41F

secondary

#A864CB

accent

#3AEDB1

background

#F9FCF6

surface

#F1F9EC

border

#CBD2C7

text

#0D1307

muted

#7E827A

Preview Lab

Preview with #51B41F

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

Preview Lab → · Contrast checker → · Palette generator →