#B1CA21#B1CA21

#B1CA21 is a light, vivid yellow. Relative luminance 0.517; OKLCH L 79.3% C 0.178 H 118.5°. Best body text is #000000 at 11.34:1 contrast (WCAG AA passes).

Color values

HEX	#B1CA21
RGB	rgb(177, 202, 33)
HSL	hsl(69, 72%, 46%)
HSV	hsv(69, 84%, 79%)
CMYK	cmyk(12.4%, 0%, 83.7%, 20.8%)
CIE-LAB	lab(77.10, -28.08, 72.33)
CIE-LCH	lch(77.10, 77.59, 111.22°)
OKLab	oklab(79.3% -0.085 0.1562)
OKLCH	oklch(79.3% 0.178 118.5)
XYZ	xyz(39.5275, 51.6983, 9.3350)
Luminance	0.5170 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B1CA21 #3A21CA

analogous

#CA8E21 #B1CA21 #5CCA21

triadic

#B1CA21 #21B1CA #CA21B1

tetradic

#B1CA21 #21CA8E #3A21CA #CA215C

square

#B1CA21 #21CA8E #3A21CA #CA215C

split-complementary

#B1CA21 #215CCA #8E21CA

monochromatic

#556110 #839518 #B1CA21 #CAE147 #D9EA7C

Accessibility & contrast

On white

1.85

#B1CA21 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.34

#B1CA21 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #B1CA21

11.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B1CA21	#FFFFFF	#000000	##000000
##B1CA21	1.00	1.85	11.34	11.34
#FFFFFF	1.85	1.00	21.00	21.00
#000000	11.34	21.00	1.00	1.00
##000000	11.34	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D8BE00

Deuteranopia (green-blind)

#D5BF34

Tritanopia (blue-blind)

#BCBEAC

Achromatopsia (no color)

#BEBEBE

Design tokens & code

CSS

--color: #b1ca21;
/* rgb */ color: rgb(177, 202, 33);
/* oklch */ color: oklch(79.3% 0.178 118.5);

Tailwind

colors: {
  custom: {
    50: '#cdda6f',
    500: '#b1ca21',
    950: '#000000',
  },
}

SCSS

$custom: #b1ca21;
$custom-light: #cdda6f;
$custom-dark: #000000;

JSON

{
  "hex": "#b1ca21",
  "rgb": {
    "r": 177,
    "g": 202,
    "b": 33
  },
  "hsl": {
    "h": 68.876,
    "s": 71.915,
    "l": 46.078
  },
  "oklch": {
    "l": 0.79303,
    "c": 0.17784,
    "h": 118.5
  },
  "luminance": 0.51698
}

Semantic roles & 50–950 ramp

primary

#B1CA21

secondary

#2E246C

accent

#39EF54

background

#FEFEFB

surface

#FBFBF1

border

#D4D4CB

text

#141408

muted

#83837D

Preview Lab

Preview with #B1CA21

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

Preview Lab → · Contrast checker → · Palette generator →