#51AE21#51AE21

#51AE21 is a light, vivid yellow-green. Relative luminance 0.321; OKLCH L 66.8% C 0.191 H 137.7°. Best body text is #000000 at 7.43:1 contrast (WCAG AA passes).

Color values

HEX	#51AE21
RGB	rgb(81, 174, 33)
HSL	hsl(100, 68%, 41%)
HSV	hsv(100, 81%, 68%)
CMYK	cmyk(53.4%, 0%, 81%, 31.8%)
CIE-LAB	lab(63.45, -51.12, 58.22)
CIE-LCH	lch(63.45, 77.48, 131.28°)
OKLab	oklab(66.8% -0.1417 0.1288)
OKLCH	oklch(66.8% 0.191 137.7)
XYZ	xyz(18.8033, 32.1298, 6.6494)
Luminance	0.3213 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51AE21 #7E21AE

analogous

#98AE21 #51AE21 #21AE37

triadic

#51AE21 #2151AE #AE2151

tetradic

#51AE21 #2198AE #7E21AE #AE3721

square

#51AE21 #2198AE #7E21AE #AE3721

split-complementary

#51AE21 #3721AE #AE2198

monochromatic

#21470D #397B17 #51AE21 #6CD834 #91E267

Accessibility & contrast

On white

2.83

#51AE21 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.43

#51AE21 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51AE21

7.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51AE21	#FFFFFF	#000000	##000000
##51AE21	1.00	2.83	7.43	7.43
#FFFFFF	2.83	1.00	21.00	21.00
#000000	7.43	21.00	1.00	1.00
##000000	7.43	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B49E00

Deuteranopia (green-blind)

#A89732

Tritanopia (blue-blind)

#4AA894

Achromatopsia (no color)

#9A9A9A

Design tokens & code

CSS

--color: #51ae21;
/* rgb */ color: rgb(81, 174, 33);
/* oklch */ color: oklch(66.8% 0.191 137.7);

Tailwind

colors: {
  custom: {
    50: '#8cc769',
    500: '#51ae21',
    950: '#000000',
  },
}

SCSS

$custom: #51ae21;
$custom-light: #8cc769;
$custom-dark: #000000;

JSON

{
  "hex": "#51ae21",
  "rgb": {
    "r": 81,
    "g": 174,
    "b": 33
  },
  "hsl": {
    "h": 99.574,
    "s": 68.116,
    "l": 40.588
  },
  "oklch": {
    "l": 0.66801,
    "c": 0.19145,
    "h": 137.7
  },
  "luminance": 0.32131
}

Semantic roles & 50–950 ramp

primary

#51AE21

secondary

#A563C8

accent

#3DEBB0

background

#F9FCF6

surface

#F1F8EC

border

#CBD1C7

text

#0D1307

muted

#7E827A

Preview Lab

Preview with #51AE21

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

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