#63B31F#63B31F

#63B31F is a light, vivid yellow-green. Relative luminance 0.350; OKLCH L 68.9% C 0.189 H 134.8°. Best body text is #000000 at 8.00:1 contrast (WCAG AA passes).

Color values

HEX	#63B31F
RGB	rgb(99, 179, 31)
HSL	hsl(92, 70%, 41%)
HSV	hsv(92, 83%, 70%)
CMYK	cmyk(44.7%, 0%, 82.7%, 29.8%)
CIE-LAB	lab(65.74, -47.62, 61.13)
CIE-LCH	lch(65.74, 77.49, 127.92°)
OKLab	oklab(68.88% -0.1336 0.1343)
OKLCH	oklch(68.88% 0.189 134.8)
XYZ	xyz(21.5126, 34.9905, 6.9164)
Luminance	0.3499 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B31F #6F1FB3

analogous

#ADB31F #63B31F #1FB325

triadic

#63B31F #1F63B3 #B31F63

tetradic

#63B31F #1FADB3 #6F1FB3 #B3251F

square

#63B31F #1FADB3 #6F1FB3 #B3251F

split-complementary

#63B31F #251FB3 #B31FAD

monochromatic

#294B0D #467F16 #63B31F #81DC33 #A1E568

Accessibility & contrast

On white

2.63

#63B31F on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.00

#63B31F on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B31F

8.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B31F	#FFFFFF	#000000	##000000
##63B31F	1.00	2.63	8.00	8.00
#FFFFFF	2.63	1.00	21.00	21.00
#000000	8.00	21.00	1.00	1.00
##000000	8.00	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BAA400

Deuteranopia (green-blind)

#AF9D31

Tritanopia (blue-blind)

#61AC99

Achromatopsia (no color)

#A0A0A0

Design tokens & code

CSS

--color: #63b31f;
/* rgb */ color: rgb(99, 179, 31);
/* oklch */ color: oklch(68.9% 0.189 134.8);

Tailwind

colors: {
  custom: {
    50: '#97ca69',
    500: '#63b31f',
    950: '#000000',
  },
}

SCSS

$custom: #63b31f;
$custom-light: #97ca69;
$custom-dark: #000000;

JSON

{
  "hex": "#63b31f",
  "rgb": {
    "r": 99,
    "g": 179,
    "b": 31
  },
  "hsl": {
    "h": 92.432,
    "s": 70.476,
    "l": 41.176
  },
  "oklch": {
    "l": 0.68883,
    "c": 0.18941,
    "h": 134.8
  },
  "luminance": 0.34992
}

Semantic roles & 50–950 ramp

primary

#63B31F

secondary

#9B64CA

accent

#3BED9B

background

#F9FCF6

surface

#F2F8EC

border

#CCD1C7

text

#0E1307

muted

#7E827A

Preview Lab

Preview with #63B31F

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

Preview Lab → · Contrast checker → · Palette generator →