#51A128#51A128

#51A128 is a light, vivid yellow-green. Relative luminance 0.274; OKLCH L 63.4% C 0.172 H 137.3°. Best body text is #000000 at 6.48:1 contrast (WCAG AA passes).

Color values

HEX	#51A128
RGB	rgb(81, 161, 40)
HSL	hsl(100, 60%, 39%)
HSV	hsv(100, 75%, 63%)
CMYK	cmyk(49.7%, 0%, 75.2%, 36.9%)
CIE-LAB	lab(59.33, -45.68, 52.03)
CIE-LCH	lch(59.33, 69.24, 131.28°)
OKLab	oklab(63.42% -0.1266 0.1169)
OKLCH	oklch(63.42% 0.172 137.3)
XYZ	xyz(16.5207, 27.3911, 6.4235)
Luminance	0.2739 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A128 #7828A1

analogous

#8EA128 #51A128 #28A13B

triadic

#51A128 #2851A1 #A12851

tetradic

#51A128 #288EA1 #7828A1 #A13B28

square

#51A128 #288EA1 #7828A1 #A13B28

split-complementary

#51A128 #3B28A1 #A1288E

monochromatic

#203F10 #38701C #51A128 #6BCE39 #90DA6A

Accessibility & contrast

On white

3.24

#51A128 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.48

#51A128 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #51A128

6.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A128	#FFFFFF	#000000	##000000
##51A128	1.00	3.24	6.48	6.48
#FFFFFF	3.24	1.00	21.00	21.00
#000000	6.48	21.00	1.00	1.00
##000000	6.48	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A6930F

Deuteranopia (green-blind)

#9C8C34

Tritanopia (blue-blind)

#4C9B8A

Achromatopsia (no color)

#8F8F8F

Design tokens & code

CSS

--color: #51a128;
/* rgb */ color: rgb(81, 161, 40);
/* oklch */ color: oklch(63.4% 0.172 137.3);

Tailwind

colors: {
  custom: {
    50: '#8abd6b',
    500: '#51a128',
    950: '#000000',
  },
}

SCSS

$custom: #51a128;
$custom-light: #8abd6b;
$custom-dark: #000000;

JSON

{
  "hex": "#51a128",
  "rgb": {
    "r": 81,
    "g": 161,
    "b": 40
  },
  "hsl": {
    "h": 99.669,
    "s": 60.199,
    "l": 39.412
  },
  "oklch": {
    "l": 0.63423,
    "c": 0.17231,
    "h": 137.3
  },
  "luminance": 0.27392
}

Semantic roles & 50–950 ramp

primary

#51A128

secondary

#A165C0

accent

#44E3AE

background

#F8FBF6

surface

#F0F7EC

border

#CBD0C7

text

#0C1207

muted

#7D817A

Preview Lab

Preview with #51A128

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

Preview Lab → · Contrast checker → · Palette generator →