#51B31A#51B31A

#51B31A is a light, vivid yellow-green. Relative luminance 0.341; OKLCH L 68.1% C 0.200 H 137.7°. Best body text is #000000 at 7.81:1 contrast (WCAG AA passes).

Color values

HEX	#51B31A
RGB	rgb(81, 179, 26)
HSL	hsl(98, 75%, 40%)
HSV	hsv(98, 85%, 70%)
CMYK	cmyk(54.7%, 0%, 85.5%, 29.8%)
CIE-LAB	lab(65.01, -53.29, 61.46)
CIE-LCH	lch(65.01, 81.35, 130.93°)
OKLab	oklab(68.08% -0.1478 0.1346)
OKLCH	oklch(68.08% 0.2 137.7)
XYZ	xyz(19.6992, 34.0625, 6.5137)
Luminance	0.3406 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B31A #7C1AB3

analogous

#9EB31A #51B31A #1AB32F

triadic

#51B31A #1A51B3 #B31A51

tetradic

#51B31A #1A9EB3 #7C1AB3 #B32F1A

square

#51B31A #1A9EB3 #7C1AB3 #B32F1A

split-complementary

#51B31A #2F1AB3 #B31A9E

monochromatic

#21480A #397E12 #51B31A #6CE02A #91E860

Accessibility & contrast

On white

2.69

#51B31A on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.81

#51B31A on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B31A

7.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B31A	#FFFFFF	#000000	##000000
##51B31A	1.00	2.69	7.81	7.81
#FFFFFF	2.69	1.00	21.00	21.00
#000000	7.81	21.00	1.00	1.00
##000000	7.81	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B9A300

Deuteranopia (green-blind)

#AD9B2F

Tritanopia (blue-blind)

#49AC98

Achromatopsia (no color)

#9E9E9E

Design tokens & code

CSS

--color: #51b31a;
/* rgb */ color: rgb(81, 179, 26);
/* oklch */ color: oklch(68.1% 0.200 137.7);

Tailwind

colors: {
  custom: {
    50: '#8dca67',
    500: '#51b31a',
    950: '#000000',
  },
}

SCSS

$custom: #51b31a;
$custom-light: #8dca67;
$custom-dark: #000000;

JSON

{
  "hex": "#51b31a",
  "rgb": {
    "r": 81,
    "g": 179,
    "b": 26
  },
  "hsl": {
    "h": 98.431,
    "s": 74.634,
    "l": 40.196
  },
  "oklch": {
    "l": 0.6808,
    "c": 0.19993,
    "h": 137.7
  },
  "luminance": 0.34064
}

Semantic roles & 50–950 ramp

primary

#51B31A

secondary

#A45DCC

accent

#37F1AE

background

#F9FCF6

surface

#F1F8EB

border

#CBD1C6

text

#0D1307

muted

#7E827A

Preview Lab

Preview with #51B31A

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

Preview Lab → · Contrast checker → · Palette generator →