#51B418#51B418

#51B418 is a light, highly saturated yellow-green. Relative luminance 0.345; OKLCH L 68.3% C 0.202 H 137.7°. Best body text is #000000 at 7.89:1 contrast (WCAG AA passes).

Color values

HEX	#51B418
RGB	rgb(81, 180, 24)
HSL	hsl(98, 76%, 40%)
HSV	hsv(98, 87%, 71%)
CMYK	cmyk(55%, 0%, 86.7%, 29.4%)
CIE-LAB	lab(65.32, -53.74, 62.18)
CIE-LCH	lch(65.32, 82.18, 130.84°)
OKLab	oklab(68.34% -0.1491 0.1359)
OKLCH	oklch(68.34% 0.202 137.7)
XYZ	xyz(19.8788, 34.4562, 6.4672)
Luminance	0.3446 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B418 #7B18B4

analogous

#9FB418 #51B418 #18B42D

triadic

#51B418 #1851B4 #B41851

tetradic

#51B418 #189FB4 #7B18B4 #B42D18

square

#51B418 #189FB4 #7B18B4 #B42D18

split-complementary

#51B418 #2D18B4 #B4189F

monochromatic

#20480A #397E11 #51B418 #6BE227 #90E95D

Accessibility & contrast

On white

2.66

#51B418 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.89

#51B418 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B418

7.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B418	#FFFFFF	#000000	##000000
##51B418	1.00	2.66	7.89	7.89
#FFFFFF	2.66	1.00	21.00	21.00
#000000	7.89	21.00	1.00	1.00
##000000	7.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BAA400

Deuteranopia (green-blind)

#AE9C2E

Tritanopia (blue-blind)

#49AD99

Achromatopsia (no color)

#9F9F9F

Design tokens & code

CSS

--color: #51b418;
/* rgb */ color: rgb(81, 180, 24);
/* oklch */ color: oklch(68.3% 0.202 137.7);

Tailwind

colors: {
  custom: {
    50: '#8dcb67',
    500: '#51b418',
    950: '#000000',
  },
}

SCSS

$custom: #51b418;
$custom-light: #8dcb67;
$custom-dark: #000000;

JSON

{
  "hex": "#51b418",
  "rgb": {
    "r": 81,
    "g": 180,
    "b": 24
  },
  "hsl": {
    "h": 98.077,
    "s": 76.471,
    "l": 40
  },
  "oklch": {
    "l": 0.68335,
    "c": 0.20172,
    "h": 137.7
  },
  "luminance": 0.34458
}

Semantic roles & 50–950 ramp

primary

#51B418

secondary

#A35BCD

accent

#35F3AE

background

#F9FCF6

surface

#F2F9EB

border

#CCD2C6

text

#0D1307

muted

#7E827A

Preview Lab

Preview with #51B418

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

Preview Lab → · Contrast checker → · Palette generator →