#B1F251#B1F251

#B1F251 is a very light, vivid yellow-green. Relative luminance 0.734; OKLCH L 88.7% C 0.199 H 128.8°. Best body text is #000000 at 15.69:1 contrast (WCAG AA passes).

Color values

HEX	#B1F251
RGB	rgb(177, 242, 81)
HSL	hsl(84, 86%, 63%)
HSV	hsv(84, 67%, 95%)
CMYK	cmyk(26.9%, 0%, 66.5%, 5.1%)
CIE-LAB	lab(88.66, -43.84, 68.19)
CIE-LCH	lch(88.66, 81.07, 122.74°)
OKLab	oklab(88.74% -0.1245 0.1548)
OKLCH	oklch(88.74% 0.199 128.8)
XYZ	xyz(51.3686, 73.4442, 19.2527)
Luminance	0.7345 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B1F251 #9251F2

analogous

#F2E351 #B1F251 #60F251

triadic

#B1F251 #51B1F2 #F251B1

tetradic

#B1F251 #51F2E3 #9251F2 #F25160

square

#B1F251 #51F2E3 #9251F2 #F25160

split-complementary

#B1F251 #5160F2 #E351F2

monochromatic

#75BB0E #97EE18 #B1F251 #CBF68A #E4FBC3

Accessibility & contrast

On white

1.34

#B1F251 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

15.69

#B1F251 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #B1F251

15.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B1F251	#FFFFFF	#000000	##000000
##B1F251	1.00	1.34	15.69	15.69
#FFFFFF	1.34	1.00	21.00	21.00
#000000	15.69	21.00	1.00	1.00
##000000	15.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FDE13A

Deuteranopia (green-blind)

#F4DD5E

Tritanopia (blue-blind)

#B6E8D1

Achromatopsia (no color)

#DFDFDF

Design tokens & code

CSS

--color: #b1f251;
/* rgb */ color: rgb(177, 242, 81);
/* oklch */ color: oklch(88.7% 0.199 128.8);

Tailwind

colors: {
  custom: {
    50: '#ccf68a',
    500: '#b1f251',
    950: '#000000',
  },
}

SCSS

$custom: #b1f251;
$custom-light: #ccf68a;
$custom-dark: #000000;

JSON

{
  "hex": "#b1f251",
  "rgb": {
    "r": 177,
    "g": 242,
    "b": 81
  },
  "hsl": {
    "h": 84.224,
    "s": 86.096,
    "l": 63.333
  },
  "oklch": {
    "l": 0.88735,
    "c": 0.19872,
    "h": 128.8
  },
  "luminance": 0.73445
}

Semantic roles & 50–950 ramp

primary

#B1F251

secondary

#662EB9

accent

#03E35D

background

#FEFFFC

surface

#FBFEF4

border

#D4D6CE

text

#14170C

muted

#83857F

Preview Lab

Preview with #B1F251

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

Preview Lab → · Contrast checker → · Palette generator →