#63C91B#63C91B

#63C91B is a light, highly saturated yellow-green. Relative luminance 0.445; OKLCH L 74.5% C 0.216 H 136.6°. Best body text is #000000 at 9.90:1 contrast (WCAG AA passes).

Color values

HEX	#63C91B
RGB	rgb(99, 201, 27)
HSL	hsl(95, 76%, 45%)
HSV	hsv(95, 87%, 79%)
CMYK	cmyk(50.7%, 0%, 86.6%, 21.2%)
CIE-LAB	lab(72.56, -56.21, 68.08)
CIE-LCH	lch(72.56, 88.29, 129.54°)
OKLab	oklab(74.49% -0.1567 0.1485)
OKLCH	oklch(74.49% 0.216 136.6)
XYZ	xyz(26.2293, 44.5032, 8.2445)
Luminance	0.4451 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63C91B #811BC9

analogous

#BAC91B #63C91B #1BC92A

triadic

#63C91B #1B63C9 #C91B63

tetradic

#63C91B #1BBAC9 #811BC9 #C92A1B

square

#63C91B #1BBAC9 #811BC9 #C92A1B

split-complementary

#63C91B #2A1BC9 #C91BBA

monochromatic

#2E5D0D #489314 #63C91B #82E53C #A5EC72

Accessibility & contrast

On white

2.12

#63C91B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.90

#63C91B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63C91B

9.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63C91B	#FFFFFF	#000000	##000000
##63C91B	1.00	2.12	9.90	9.90
#FFFFFF	2.12	1.00	21.00	21.00
#000000	9.90	21.00	1.00	1.00
##000000	9.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D0B700

Deuteranopia (green-blind)

#C3AF34

Tritanopia (blue-blind)

#5DC1AB

Achromatopsia (no color)

#B2B2B2

Design tokens & code

CSS

--color: #63c91b;
/* rgb */ color: rgb(99, 201, 27);
/* oklch */ color: oklch(74.5% 0.216 136.6);

Tailwind

colors: {
  custom: {
    50: '#9ada6b',
    500: '#63c91b',
    950: '#000000',
  },
}

SCSS

$custom: #63c91b;
$custom-light: #9ada6b;
$custom-dark: #000000;

JSON

{
  "hex": "#63c91b",
  "rgb": {
    "r": 99,
    "g": 201,
    "b": 27
  },
  "hsl": {
    "h": 95.172,
    "s": 76.316,
    "l": 44.706
  },
  "oklch": {
    "l": 0.7449,
    "c": 0.21587,
    "h": 136.6
  },
  "luminance": 0.44505
}

Semantic roles & 50–950 ramp

primary

#63C91B

secondary

#A96DD3

accent

#35F3A4

background

#FAFDF6

surface

#F3FBEC

border

#CDD4C7

text

#0F1508

muted

#7F837A

Preview Lab

Preview with #63C91B

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

Preview Lab → · Contrast checker → · Palette generator →