#B1C21F#B1C21F

#B1C21F is a light, vivid yellow. Relative luminance 0.480; OKLCH L 77.5% C 0.170 H 116.1°. Best body text is #000000 at 10.61:1 contrast (WCAG AA passes).

Color values

HEX	#B1C21F
RGB	rgb(177, 194, 31)
HSL	hsl(66, 72%, 44%)
HSV	hsv(66, 84%, 76%)
CMYK	cmyk(8.8%, 0%, 84%, 23.9%)
CIE-LAB	lab(74.84, -24.29, 70.88)
CIE-LCH	lch(74.84, 74.92, 108.92°)
OKLab	oklab(77.49% -0.0747 0.1528)
OKLCH	oklch(77.49% 0.17 116.1)
XYZ	xyz(37.6717, 48.0302, 8.5823)
Luminance	0.4803 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B1C21F #301FC2

analogous

#C2821F #B1C21F #5FC21F

triadic

#B1C21F #1FB1C2 #C21FB1

tetradic

#B1C21F #1FC282 #301FC2 #C21F5F

square

#B1C21F #1FC282 #301FC2 #C21F5F

split-complementary

#B1C21F #1F5FC2 #821FC2

monochromatic

#51580E #818D17 #B1C21F #CFE03E #DCE973

Accessibility & contrast

On white

1.98

#B1C21F on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.61

#B1C21F on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #B1C21F

10.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B1C21F	#FFFFFF	#000000	##000000
##B1C21F	1.00	1.98	10.61	10.61
#FFFFFF	1.98	1.00	21.00	21.00
#000000	10.61	21.00	1.00	1.00
##000000	10.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D0B700

Deuteranopia (green-blind)

#CFB931

Tritanopia (blue-blind)

#BDB6A6

Achromatopsia (no color)

#B8B8B8

Design tokens & code

CSS

--color: #b1c21f;
/* rgb */ color: rgb(177, 194, 31);
/* oklch */ color: oklch(77.5% 0.170 116.1);

Tailwind

colors: {
  custom: {
    50: '#ccd46d',
    500: '#b1c21f',
    950: '#000000',
  },
}

SCSS

$custom: #b1c21f;
$custom-light: #ccd46d;
$custom-dark: #000000;

JSON

{
  "hex": "#b1c21f",
  "rgb": {
    "r": 177,
    "g": 194,
    "b": 31
  },
  "hsl": {
    "h": 66.258,
    "s": 72.444,
    "l": 44.118
  },
  "oklch": {
    "l": 0.77485,
    "c": 0.17005,
    "h": 116.1
  },
  "luminance": 0.4803
}

Semantic roles & 50–950 ramp

primary

#B1C21F

secondary

#786DCF

accent

#39EF4C

background

#FDFCF7

surface

#FAF9ED

border

#D3D2C8

text

#141408

muted

#83827B

Preview Lab

Preview with #B1C21F

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

Preview Lab → · Contrast checker → · Palette generator →