#51B319#51B319

#51B319 is a light, highly saturated yellow-green. Relative luminance 0.341; OKLCH L 68.1% C 0.200 H 137.6°. Best body text is #000000 at 7.81:1 contrast (WCAG AA passes).

Color values

HEX	#51B319
RGB	rgb(81, 179, 25)
HSL	hsl(98, 75%, 40%)
HSV	hsv(98, 86%, 70%)
CMYK	cmyk(54.7%, 0%, 86%, 29.8%)
CIE-LAB	lab(65.01, -53.33, 61.68)
CIE-LCH	lch(65.01, 81.54, 130.85°)
OKLab	oklab(68.08% -0.148 0.1349)
OKLCH	oklch(68.08% 0.2 137.6)
XYZ	xyz(19.6882, 34.0581, 6.4559)
Luminance	0.3406 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B319 #7B19B3

analogous

#9EB319 #51B319 #19B32E

triadic

#51B319 #1951B3 #B31951

tetradic

#51B319 #199EB3 #7B19B3 #B32E19

square

#51B319 #199EB3 #7B19B3 #B32E19

split-complementary

#51B319 #2E19B3 #B3199E

monochromatic

#20480A #397D12 #51B319 #6BE128 #90E85E

Accessibility & contrast

On white

2.69

#51B319 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.81

#51B319 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B319

7.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B319	#FFFFFF	#000000	##000000
##51B319	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)

#AD9B2E

Tritanopia (blue-blind)

#49AC98

Achromatopsia (no color)

#9E9E9E

Design tokens & code

CSS

--color: #51b319;
/* rgb */ color: rgb(81, 179, 25);
/* oklch */ color: oklch(68.1% 0.200 137.6);

Tailwind

colors: {
  custom: {
    50: '#8dca67',
    500: '#51b319',
    950: '#000000',
  },
}

SCSS

$custom: #51b319;
$custom-light: #8dca67;
$custom-dark: #000000;

JSON

{
  "hex": "#51b319",
  "rgb": {
    "r": 81,
    "g": 179,
    "b": 25
  },
  "hsl": {
    "h": 98.182,
    "s": 75.49,
    "l": 40
  },
  "oklch": {
    "l": 0.68076,
    "c": 0.20027,
    "h": 137.6
  },
  "luminance": 0.3406
}

Semantic roles & 50–950 ramp

primary

#51B319

secondary

#A35BCC

accent

#36F2AE

background

#F9FCF6

surface

#F1F8EB

border

#CBD1C6

text

#0D1307

muted

#7E827A

Preview Lab

Preview with #51B319

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

Preview Lab → · Contrast checker → · Palette generator →