#51A923#51A923

#51A923 is a light, vivid yellow-green. Relative luminance 0.302; OKLCH L 65.5% C 0.185 H 137.5°. Best body text is #000000 at 7.05:1 contrast (WCAG AA passes).

Color values

HEX	#51A923
RGB	rgb(81, 169, 35)
HSL	hsl(99, 66%, 40%)
HSV	hsv(99, 79%, 66%)
CMYK	cmyk(52.1%, 0%, 79.3%, 33.7%)
CIE-LAB	lab(61.87, -49.11, 56.14)
CIE-LCH	lch(61.87, 74.59, 131.18°)
OKLab	oklab(65.5% -0.1362 0.1247)
OKLCH	oklch(65.5% 0.185 137.5)
XYZ	xyz(17.8841, 30.2453, 6.4853)
Luminance	0.3025 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A923 #7B23A9

analogous

#94A923 #51A923 #23A938

triadic

#51A923 #2351A9 #A92351

tetradic

#51A923 #2394A9 #7B23A9 #A93823

square

#51A923 #2394A9 #7B23A9 #A93823

split-complementary

#51A923 #3823A9 #A92394

monochromatic

#20440E #397619 #51A923 #6BD534 #90DF67

Accessibility & contrast

On white

2.98

#51A923 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.05

#51A923 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A923

7.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A923	#FFFFFF	#000000	##000000
##51A923	1.00	2.98	7.05	7.05
#FFFFFF	2.98	1.00	21.00	21.00
#000000	7.05	21.00	1.00	1.00
##000000	7.05	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AF9A00

Deuteranopia (green-blind)

#A39332

Tritanopia (blue-blind)

#4BA390

Achromatopsia (no color)

#959595

Design tokens & code

CSS

--color: #51a923;
/* rgb */ color: rgb(81, 169, 35);
/* oklch */ color: oklch(65.5% 0.185 137.5);

Tailwind

colors: {
  custom: {
    50: '#8bc369',
    500: '#51a923',
    950: '#000000',
  },
}

SCSS

$custom: #51a923;
$custom-light: #8bc369;
$custom-dark: #000000;

JSON

{
  "hex": "#51a923",
  "rgb": {
    "r": 81,
    "g": 169,
    "b": 35
  },
  "hsl": {
    "h": 99.403,
    "s": 65.686,
    "l": 40
  },
  "oklch": {
    "l": 0.65498,
    "c": 0.18465,
    "h": 137.5
  },
  "luminance": 0.30247
}

Semantic roles & 50–950 ramp

primary

#51A923

secondary

#A363C5

accent

#3FE9AE

background

#F9FCF6

surface

#F1F8EB

border

#CBD1C6

text

#0D1207

muted

#7E817A

Preview Lab

Preview with #51A923

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

Preview Lab → · Contrast checker → · Palette generator →