#B1D538#B1D538

#B1D538 is a light, vivid yellow-green. Relative luminance 0.572; OKLCH L 81.9% C 0.180 H 122.0°. Best body text is #000000 at 12.44:1 contrast (WCAG AA passes).

Color values

HEX	#B1D538
RGB	rgb(177, 213, 56)
HSL	hsl(74, 65%, 53%)
HSV	hsv(74, 74%, 84%)
CMYK	cmyk(16.9%, 0%, 73.7%, 16.5%)
CIE-LAB	lab(80.30, -32.34, 68.74)
CIE-LCH	lch(80.30, 75.96, 115.20°)
OKLab	oklab(81.92% -0.095 0.1523)
OKLCH	oklch(81.92% 0.18 122)
XYZ	xyz(42.6402, 57.2211, 12.5390)
Luminance	0.5722 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B1D538 #5C38D5

analogous

#D5AA38 #B1D538 #62D538

triadic

#B1D538 #38B1D5 #D538B1

tetradic

#B1D538 #38D5AA #5C38D5 #D53862

square

#B1D538 #38D5AA #5C38D5 #D53862

split-complementary

#B1D538 #3862D5 #AA38D5

monochromatic

#63791A #8DAC24 #B1D538 #C5E06B #D9EA9D

Accessibility & contrast

On white

1.69

#B1D538 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.44

#B1D538 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #B1D538

12.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B1D538	#FFFFFF	#000000	##000000
##B1D538	1.00	1.69	12.44	12.44
#FFFFFF	1.69	1.00	21.00	21.00
#000000	12.44	21.00	1.00	1.00
##000000	12.44	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#E2C816

Deuteranopia (green-blind)

#DDC746

Tritanopia (blue-blind)

#BACAB7

Achromatopsia (no color)

#C7C7C7

Design tokens & code

CSS

--color: #b1d538;
/* rgb */ color: rgb(177, 213, 56);
/* oklch */ color: oklch(81.9% 0.180 122.0);

Tailwind

colors: {
  custom: {
    50: '#cce27a',
    500: '#b1d538',
    950: '#000000',
  },
}

SCSS

$custom: #b1d538;
$custom-light: #cce27a;
$custom-dark: #000000;

JSON

{
  "hex": "#b1d538",
  "rgb": {
    "r": 177,
    "g": 213,
    "b": 56
  },
  "hsl": {
    "h": 73.758,
    "s": 65.145,
    "l": 52.745
  },
  "oklch": {
    "l": 0.81919,
    "c": 0.17954,
    "h": 122
  },
  "luminance": 0.57221
}

Semantic roles & 50–950 ramp

primary

#B1D538

secondary

#433081

accent

#40E866

background

#FEFEFB

surface

#FBFCF2

border

#D4D5CC

text

#14150A

muted

#83847D

Preview Lab

Preview with #B1D538

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

Preview Lab → · Contrast checker → · Palette generator →