#51AA1B#51AA1B

#51AA1B is a light, vivid yellow-green. Relative luminance 0.306; OKLCH L 65.7% C 0.189 H 137.1°. Best body text is #000000 at 7.12:1 contrast (WCAG AA passes).

Color values

HEX	#51AA1B
RGB	rgb(81, 170, 27)
HSL	hsl(97, 73%, 39%)
HSV	hsv(97, 84%, 67%)
CMYK	cmyk(52.4%, 0%, 84.1%, 33.3%)
CIE-LAB	lab(62.15, -49.90, 58.67)
CIE-LCH	lch(62.15, 77.02, 130.38°)
OKLab	oklab(65.72% -0.1387 0.1289)
OKLCH	oklch(65.72% 0.189 137.1)
XYZ	xyz(17.9653, 30.5766, 5.9919)
Luminance	0.3058 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51AA1B #741BAA

analogous

#98AA1B #51AA1B #1BAA2D

triadic

#51AA1B #1B51AA #AA1B51

tetradic

#51AA1B #1B98AA #741BAA #AA2D1B

square

#51AA1B #1B98AA #741BAA #AA2D1B

split-complementary

#51AA1B #2D1BAA #AA1B98

monochromatic

#1F400A #387513 #51AA1B #6BDC26 #8FE55B

Accessibility & contrast

On white

2.95

#51AA1B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.12

#51AA1B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51AA1B

7.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51AA1B	#FFFFFF	#000000	##000000
##51AA1B	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)

#A4932E

Tritanopia (blue-blind)

#4BA491

Achromatopsia (no color)

#969696

Design tokens & code

CSS

--color: #51aa1b;
/* rgb */ color: rgb(81, 170, 27);
/* oklch */ color: oklch(65.7% 0.189 137.1);

Tailwind

colors: {
  custom: {
    50: '#8bc466',
    500: '#51aa1b',
    950: '#000000',
  },
}

SCSS

$custom: #51aa1b;
$custom-light: #8bc466;
$custom-dark: #000000;

JSON

{
  "hex": "#51aa1b",
  "rgb": {
    "r": 81,
    "g": 170,
    "b": 27
  },
  "hsl": {
    "h": 97.343,
    "s": 72.589,
    "l": 38.627
  },
  "oklch": {
    "l": 0.65719,
    "c": 0.18932,
    "h": 137.1
  },
  "luminance": 0.30578
}

Semantic roles & 50–950 ramp

primary

#51AA1B

secondary

#9E58C9

accent

#39EFAA

background

#F9FCF6

surface

#F1F8EB

border

#CBD1C6

text

#0D1307

muted

#7E827A

Preview Lab

Preview with #51AA1B

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

Preview Lab → · Contrast checker → · Palette generator →