#B5F251#B5F251

#B5F251 is a very light, vivid yellow-green. Relative luminance 0.739; OKLCH L 89.0% C 0.197 H 127.9°. Best body text is #000000 at 15.78:1 contrast (WCAG AA passes).

Color values

HEX	#B5F251
RGB	rgb(181, 242, 81)
HSL	hsl(83, 86%, 63%)
HSV	hsv(83, 67%, 95%)
CMYK	cmyk(25.2%, 0%, 66.5%, 5.1%)
CIE-LAB	lab(88.89, -42.38, 68.50)
CIE-LCH	lch(88.89, 80.55, 121.75°)
OKLab	oklab(88.98% -0.1208 0.1554)
OKLCH	oklch(88.98% 0.197 127.9)
XYZ	xyz(52.2934, 73.9210, 19.2961)
Luminance	0.7392 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B5F251 #8E51F2

analogous

#F2DE51 #B5F251 #64F251

triadic

#B5F251 #51B5F2 #F251B5

tetradic

#B5F251 #51F2DE #8E51F2 #F25164

square

#B5F251 #51F2DE #8E51F2 #F25164

split-complementary

#B5F251 #5164F2 #DE51F2

monochromatic

#79BB0E #9DEE18 #B5F251 #CDF68A #E5FBC3

Accessibility & contrast

On white

1.33

#B5F251 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

15.78

#B5F251 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #B5F251

15.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B5F251	#FFFFFF	#000000	##000000
##B5F251	1.00	1.33	15.78	15.78
#FFFFFF	1.33	1.00	21.00	21.00
#000000	15.78	21.00	1.00	1.00
##000000	15.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FEE23A

Deuteranopia (green-blind)

#F5DE5E

Tritanopia (blue-blind)

#BBE7D2

Achromatopsia (no color)

#DFDFDF

Design tokens & code

CSS

--color: #b5f251;
/* rgb */ color: rgb(181, 242, 81);
/* oklch */ color: oklch(89.0% 0.197 127.9);

Tailwind

colors: {
  custom: {
    50: '#cff68a',
    500: '#b5f251',
    950: '#000000',
  },
}

SCSS

$custom: #b5f251;
$custom-light: #cff68a;
$custom-dark: #000000;

JSON

{
  "hex": "#b5f251",
  "rgb": {
    "r": 181,
    "g": 242,
    "b": 81
  },
  "hsl": {
    "h": 82.733,
    "s": 86.096,
    "l": 63.333
  },
  "oklch": {
    "l": 0.88977,
    "c": 0.19684,
    "h": 127.9
  },
  "luminance": 0.73922
}

Semantic roles & 50–950 ramp

primary

#B5F251

secondary

#632EB9

accent

#03E358

background

#FEFFFC

surface

#FBFEF4

border

#D4D6CE

text

#14170C

muted

#83857F

Preview Lab

Preview with #B5F251

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

Preview Lab → · Contrast checker → · Palette generator →