#51AD1F#51AD1F

#51AD1F is a light, vivid yellow-green. Relative luminance 0.317; OKLCH L 66.5% C 0.191 H 137.5°. Best body text is #000000 at 7.35:1 contrast (WCAG AA passes).

Color values

HEX	#51AD1F
RGB	rgb(81, 173, 31)
HSL	hsl(99, 70%, 40%)
HSV	hsv(99, 82%, 68%)
CMYK	cmyk(53.2%, 0%, 82.1%, 32.2%)
CIE-LAB	lab(63.12, -50.84, 58.49)
CIE-LCH	lch(63.12, 77.50, 131.00°)
OKLab	oklab(66.53% -0.141 0.129)
OKLCH	oklch(66.53% 0.191 137.5)
XYZ	xyz(18.5836, 31.7340, 6.4421)
Luminance	0.3174 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51AD1F #7B1FAD

analogous

#98AD1F #51AD1F #1FAD34

triadic

#51AD1F #1F51AD #AD1F51

tetradic

#51AD1F #1F98AD #7B1FAD #AD341F

square

#51AD1F #1F98AD #7B1FAD #AD341F

split-complementary

#51AD1F #341FAD #AD1F98

monochromatic

#20450C #397916 #51AD1F #6BDA2F #90E363

Accessibility & contrast

On white

2.86

#51AD1F on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.35

#51AD1F on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51AD1F

7.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51AD1F	#FFFFFF	#000000	##000000
##51AD1F	1.00	2.86	7.35	7.35
#FFFFFF	2.86	1.00	21.00	21.00
#000000	7.35	21.00	1.00	1.00
##000000	7.35	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B39D00

Deuteranopia (green-blind)

#A79631

Tritanopia (blue-blind)

#4AA793

Achromatopsia (no color)

#999999

Design tokens & code

CSS

--color: #51ad1f;
/* rgb */ color: rgb(81, 173, 31);
/* oklch */ color: oklch(66.5% 0.191 137.5);

Tailwind

colors: {
  custom: {
    50: '#8cc668',
    500: '#51ad1f',
    950: '#000000',
  },
}

SCSS

$custom: #51ad1f;
$custom-light: #8cc668;
$custom-dark: #000000;

JSON

{
  "hex": "#51ad1f",
  "rgb": {
    "r": 81,
    "g": 173,
    "b": 31
  },
  "hsl": {
    "h": 98.873,
    "s": 69.608,
    "l": 40
  },
  "oklch": {
    "l": 0.66528,
    "c": 0.19116,
    "h": 137.5
  },
  "luminance": 0.31735
}

Semantic roles & 50–950 ramp

primary

#51AD1F

secondary

#A360C8

accent

#3BECAE

background

#F9FCF6

surface

#F1F8EB

border

#CBD1C6

text

#0D1307

muted

#7E827A

Preview Lab

Preview with #51AD1F

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

Preview Lab → · Contrast checker → · Palette generator →