#63B31B#63B31B

#63B31B is a light, vivid yellow-green. Relative luminance 0.350; OKLCH L 68.9% C 0.191 H 134.7°. Best body text is #000000 at 7.99:1 contrast (WCAG AA passes).

Color values

HEX	#63B31B
RGB	rgb(99, 179, 27)
HSL	hsl(92, 74%, 40%)
HSV	hsv(92, 85%, 70%)
CMYK	cmyk(44.7%, 0%, 84.9%, 29.8%)
CIE-LAB	lab(65.73, -47.79, 62.12)
CIE-LCH	lch(65.73, 78.38, 127.57°)
OKLab	oklab(68.86% -0.1342 0.1358)
OKLCH	oklch(68.86% 0.191 134.7)
XYZ	xyz(21.4631, 34.9707, 6.6558)
Luminance	0.3497 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B31B #6B1BB3

analogous

#AFB31B #63B31B #1BB31F

triadic

#63B31B #1B63B3 #B31B63

tetradic

#63B31B #1BAFB3 #6B1BB3 #B31F1B

square

#63B31B #1BAFB3 #6B1BB3 #B31F1B

split-complementary

#63B31B #1F1BB3 #B31BAF

monochromatic

#28490B #467E13 #63B31B #81DF2C #A1E761

Accessibility & contrast

On white

2.63

#63B31B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.99

#63B31B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B31B

7.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B31B	#FFFFFF	#000000	##000000
##63B31B	1.00	2.63	7.99	7.99
#FFFFFF	2.63	1.00	21.00	21.00
#000000	7.99	21.00	1.00	1.00
##000000	7.99	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BAA400

Deuteranopia (green-blind)

#AF9D2F

Tritanopia (blue-blind)

#61AC98

Achromatopsia (no color)

#A0A0A0

Design tokens & code

CSS

--color: #63b31b;
/* rgb */ color: rgb(99, 179, 27);
/* oklch */ color: oklch(68.9% 0.191 134.7);

Tailwind

colors: {
  custom: {
    50: '#97ca68',
    500: '#63b31b',
    950: '#000000',
  },
}

SCSS

$custom: #63b31b;
$custom-light: #97ca68;
$custom-dark: #000000;

JSON

{
  "hex": "#63b31b",
  "rgb": {
    "r": 99,
    "g": 179,
    "b": 27
  },
  "hsl": {
    "h": 91.579,
    "s": 73.786,
    "l": 40.392
  },
  "oklch": {
    "l": 0.68865,
    "c": 0.19094,
    "h": 134.7
  },
  "luminance": 0.34972
}

Semantic roles & 50–950 ramp

primary

#63B31B

secondary

#985ECC

accent

#37F099

background

#F9FCF6

surface

#F2F8EB

border

#CCD1C6

text

#0E1307

muted

#7E827A

Preview Lab

Preview with #63B31B

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

Preview Lab → · Contrast checker → · Palette generator →