#51AA23#51AA23

#51AA23 is a light, vivid yellow-green. Relative luminance 0.306; OKLCH L 65.8% C 0.186 H 137.6°. Best body text is #000000 at 7.12:1 contrast (WCAG AA passes).

Color values

HEX	#51AA23
RGB	rgb(81, 170, 35)
HSL	hsl(100, 66%, 40%)
HSV	hsv(100, 79%, 67%)
CMYK	cmyk(52.4%, 0%, 79.4%, 33.3%)
CIE-LAB	lab(62.18, -49.49, 56.45)
CIE-LCH	lch(62.18, 75.07, 131.25°)
OKLab	oklab(65.76% -0.1372 0.1253)
OKLCH	oklch(65.76% 0.186 137.6)
XYZ	xyz(18.0708, 30.6188, 6.5475)
Luminance	0.3062 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51AA23 #7C23AA

analogous

#94AA23 #51AA23 #23AA39

triadic

#51AA23 #2351AA #AA2351

tetradic

#51AA23 #2394AA #7C23AA #AA3923

square

#51AA23 #2394AA #7C23AA #AA3923

split-complementary

#51AA23 #3923AA #AA2394

monochromatic

#21440E #397719 #51AA23 #6CD535 #91E068

Accessibility & contrast

On white

2.95

#51AA23 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.12

#51AA23 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51AA23

7.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51AA23	#FFFFFF	#000000	##000000
##51AA23	1.00	2.95	7.12	7.12
#FFFFFF	2.95	1.00	21.00	21.00
#000000	7.12	21.00	1.00	1.00
##000000	7.12	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B09B00

Deuteranopia (green-blind)

#A49433

Tritanopia (blue-blind)

#4BA491

Achromatopsia (no color)

#969696

Design tokens & code

CSS

--color: #51aa23;
/* rgb */ color: rgb(81, 170, 35);
/* oklch */ color: oklch(65.8% 0.186 137.6);

Tailwind

colors: {
  custom: {
    50: '#8bc469',
    500: '#51aa23',
    950: '#000000',
  },
}

SCSS

$custom: #51aa23;
$custom-light: #8bc469;
$custom-dark: #000000;

JSON

{
  "hex": "#51aa23",
  "rgb": {
    "r": 81,
    "g": 170,
    "b": 35
  },
  "hsl": {
    "h": 99.556,
    "s": 65.854,
    "l": 40.196
  },
  "oklch": {
    "l": 0.65761,
    "c": 0.18583,
    "h": 137.6
  },
  "luminance": 0.3062
}

Semantic roles & 50–950 ramp

primary

#51AA23

secondary

#A463C6

accent

#3FE9AF

background

#F9FCF6

surface

#F1F8EB

border

#CBD1C6

text

#0D1307

muted

#7E827A

Preview Lab

Preview with #51AA23

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

Preview Lab → · Contrast checker → · Palette generator →