#51A021#51A021

#51A021 is a light, vivid yellow-green. Relative luminance 0.270; OKLCH L 63.1% C 0.175 H 136.7°. Best body text is #000000 at 6.40:1 contrast (WCAG AA passes).

Color values

HEX	#51A021
RGB	rgb(81, 160, 33)
HSL	hsl(97, 66%, 38%)
HSV	hsv(97, 79%, 63%)
CMYK	cmyk(49.4%, 0%, 79.4%, 37.3%)
CIE-LAB	lab(58.97, -45.72, 54.04)
CIE-LCH	lch(58.97, 70.79, 130.24°)
OKLab	oklab(63.11% -0.1272 0.12)
OKLCH	oklch(63.11% 0.175 136.7)
XYZ	xyz(16.2382, 26.9996, 5.7943)
Luminance	0.2700 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A021 #7021A0

analogous

#90A021 #51A021 #21A031

triadic

#51A021 #2151A0 #A02151

tetradic

#51A021 #2190A0 #7021A0 #A03121

square

#51A021 #2190A0 #7021A0 #A03121

split-complementary

#51A021 #3121A0 #A02190

monochromatic

#1E3B0C #376D17 #51A021 #6BD32B #8EDE5E

Accessibility & contrast

On white

3.28

#51A021 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.40

#51A021 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #51A021

6.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A021	#FFFFFF	#000000	##000000
##51A021	1.00	3.28	6.40	6.40
#FFFFFF	3.28	1.00	21.00	21.00
#000000	6.40	21.00	1.00	1.00
##000000	6.40	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A69200

Deuteranopia (green-blind)

#9B8B2F

Tritanopia (blue-blind)

#4D9A88

Achromatopsia (no color)

#8E8E8E

Design tokens & code

CSS

--color: #51a021;
/* rgb */ color: rgb(81, 160, 33);
/* oklch */ color: oklch(63.1% 0.175 136.7);

Tailwind

colors: {
  custom: {
    50: '#8abd67',
    500: '#51a021',
    950: '#000000',
  },
}

SCSS

$custom: #51a021;
$custom-light: #8abd67;
$custom-dark: #000000;

JSON

{
  "hex": "#51a021",
  "rgb": {
    "r": 81,
    "g": 160,
    "b": 33
  },
  "hsl": {
    "h": 97.323,
    "s": 65.803,
    "l": 37.843
  },
  "oklch": {
    "l": 0.63114,
    "c": 0.17487,
    "h": 136.7
  },
  "luminance": 0.27001
}

Semantic roles & 50–950 ramp

primary

#51A021

secondary

#9B5BC2

accent

#3FE9A9

background

#F8FBF6

surface

#F0F6EB

border

#CBD0C6

text

#0C1207

muted

#7D817A

Preview Lab

Preview with #51A021

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

Preview Lab → · Contrast checker → · Palette generator →