#51B031#51B031

#51B031 is a light, vivid green. Relative luminance 0.330; OKLCH L 67.4% C 0.185 H 139.1°. Best body text is #000000 at 7.60:1 contrast (WCAG AA passes).

Color values

HEX	#51B031
RGB	rgb(81, 176, 49)
HSL	hsl(105, 56%, 44%)
HSV	hsv(105, 72%, 69%)
CMYK	cmyk(54%, 0%, 72.2%, 31%)
CIE-LAB	lab(64.18, -50.84, 53.60)
CIE-LCH	lch(64.18, 73.87, 133.49°)
OKLab	oklab(67.43% -0.14 0.1214)
OKLCH	oklch(67.43% 0.185 139.1)
XYZ	xyz(19.4723, 33.0202, 8.2526)
Luminance	0.3302 (WCAG relative)
Temperature	warm
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B031 #9031B0

analogous

#91B031 #51B031 #31B051

triadic

#51B031 #3151B0 #B03151

tetradic

#51B031 #3191B0 #9031B0 #B05131

square

#51B031 #3191B0 #9031B0 #B05131

split-complementary

#51B031 #5131B0 #B03191

monochromatic

#255016 #3B8024 #51B031 #70CE50 #97DC80

Accessibility & contrast

On white

2.76

#51B031 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.60

#51B031 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B031

7.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B031	#FFFFFF	#000000	##000000
##51B031	1.00	2.76	7.60	7.60
#FFFFFF	2.76	1.00	21.00	21.00
#000000	7.60	21.00	1.00	1.00
##000000	7.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B5A01B

Deuteranopia (green-blind)

#A9993E

Tritanopia (blue-blind)

#48AA97

Achromatopsia (no color)

#9C9C9C

Design tokens & code

CSS

--color: #51b031;
/* rgb */ color: rgb(81, 176, 49);
/* oklch */ color: oklch(67.4% 0.185 139.1);

Tailwind

colors: {
  custom: {
    50: '#8bc871',
    500: '#51b031',
    950: '#000000',
  },
}

SCSS

$custom: #51b031;
$custom-light: #8bc871;
$custom-dark: #000000;

JSON

{
  "hex": "#51b031",
  "rgb": {
    "r": 81,
    "g": 176,
    "b": 49
  },
  "hsl": {
    "h": 104.882,
    "s": 56.444,
    "l": 44.118
  },
  "oklch": {
    "l": 0.67429,
    "c": 0.18527,
    "h": 139.1
  },
  "luminance": 0.33022
}

Semantic roles & 50–950 ramp

primary

#51B031

secondary

#B178C5

accent

#48E0BA

background

#F9FCF7

surface

#F1F8ED

border

#CBD1C8

text

#0D1308

muted

#7E827B

Preview Lab

Preview with #51B031

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

Preview Lab → · Contrast checker → · Palette generator →