#B1D43B#B1D43B

#B1D43B is a light, vivid yellow-green. Relative luminance 0.568; OKLCH L 81.7% C 0.177 H 121.8°. Best body text is #000000 at 12.35:1 contrast (WCAG AA passes).

Color values

HEX	#B1D43B
RGB	rgb(177, 212, 59)
HSL	hsl(74, 64%, 53%)
HSV	hsv(74, 72%, 83%)
CMYK	cmyk(16.5%, 0%, 72.2%, 16.9%)
CIE-LAB	lab(80.04, -31.72, 67.47)
CIE-LCH	lch(80.04, 74.56, 115.18°)
OKLab	oklab(81.71% -0.0931 0.1502)
OKLCH	oklch(81.71% 0.177 121.8)
XYZ	xyz(42.4650, 56.7498, 12.8535)
Luminance	0.5675 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B1D43B #5E3BD4

analogous

#D4AA3B #B1D43B #65D43B

triadic

#B1D43B #3BB1D4 #D43BB1

tetradic

#B1D43B #3BD4AA #5E3BD4 #D43B65

square

#B1D43B #3BD4AA #5E3BD4 #D43B65

split-complementary

#B1D43B #3B65D4 #AA3BD4

monochromatic

#647A1B #8DAC26 #B1D43B #C5DF6D #D9EA9F

Accessibility & contrast

On white

1.70

#B1D43B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.35

#B1D43B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #B1D43B

12.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B1D43B	#FFFFFF	#000000	##000000
##B1D43B	1.00	1.70	12.35	12.35
#FFFFFF	1.70	1.00	21.00	21.00
#000000	12.35	21.00	1.00	1.00
##000000	12.35	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#E1C71D

Deuteranopia (green-blind)

#DCC748

Tritanopia (blue-blind)

#BAC9B6

Achromatopsia (no color)

#C6C6C6

Design tokens & code

CSS

--color: #b1d43b;
/* rgb */ color: rgb(177, 212, 59);
/* oklch */ color: oklch(81.7% 0.177 121.8);

Tailwind

colors: {
  custom: {
    50: '#cce17b',
    500: '#b1d43b',
    950: '#000000',
  },
}

SCSS

$custom: #b1d43b;
$custom-light: #cce17b;
$custom-dark: #000000;

JSON

{
  "hex": "#b1d43b",
  "rgb": {
    "r": 177,
    "g": 212,
    "b": 59
  },
  "hsl": {
    "h": 73.725,
    "s": 64.017,
    "l": 53.137
  },
  "oklch": {
    "l": 0.8171,
    "c": 0.17667,
    "h": 121.8
  },
  "luminance": 0.5675
}

Semantic roles & 50–950 ramp

primary

#B1D43B

secondary

#443182

accent

#41E767

background

#FEFEFB

surface

#FBFCF2

border

#D4D5CC

text

#14150A

muted

#83847D

Preview Lab

Preview with #B1D43B

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

Preview Lab → · Contrast checker → · Palette generator →