#ECFF4F#ECFF4F

#ECFF4F is a very light, vivid yellow. Relative luminance 0.899; OKLCH L 95.6% C 0.192 H 115.5°. Best body text is #000000 at 18.98:1 contrast (WCAG AA passes).

Color values

HEX	#ECFF4F
RGB	rgb(236, 255, 79)
HSL	hsl(66, 100%, 65%)
HSV	hsv(66, 69%, 100%)
CMYK	cmyk(7.5%, 0%, 69%, 0%)
CIE-LAB	lab(95.96, -27.30, 77.54)
CIE-LCH	lch(95.96, 82.21, 109.40°)
OKLab	oklab(95.58% -0.0824 0.1729)
OKLCH	oklch(95.58% 0.192 115.5)
XYZ	xyz(71.7652, 89.9185, 20.9711)
Luminance	0.8992 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECFF4F #624FFF

analogous

#FFBA4F #ECFF4F #94FF4F

triadic

#ECFF4F #4FECFF #FF4FEC

tetradic

#ECFF4F #4FFFBA #624FFF #FF4F94

square

#ECFF4F #4FFFBA #624FFF #FF4F94

split-complementary

#ECFF4F #4F94FF #BA4FFF

monochromatic

#BDD400 #E5FF12 #ECFF4F #F3FF8C #F9FFC9

Accessibility & contrast

On white

1.11

#ECFF4F on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.98

#ECFF4F on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECFF4F

18.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECFF4F	#FFFFFF	#000000	##000000
##ECFF4F	1.00	1.11	18.98	18.98
#FFFFFF	1.11	1.00	21.00	21.00
#000000	18.98	21.00	1.00	1.00
##000000	18.98	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF231

Deuteranopia (green-blind)

#FFF55D

Tritanopia (blue-blind)

#FBF1DC

Achromatopsia (no color)

#F3F3F3

Design tokens & code

CSS

--color: #ecff4f;
/* rgb */ color: rgb(236, 255, 79);
/* oklch */ color: oklch(95.6% 0.192 115.5);

Tailwind

colors: {
  custom: {
    50: '#f6ff8b',
    500: '#ecff4f',
    950: '#000000',
  },
}

SCSS

$custom: #ecff4f;
$custom-light: #f6ff8b;
$custom-dark: #000000;

JSON

{
  "hex": "#ecff4f",
  "rgb": {
    "r": 236,
    "g": 255,
    "b": 79
  },
  "hsl": {
    "h": 66.477,
    "s": 100,
    "l": 65.49
  },
  "oklch": {
    "l": 0.95583,
    "c": 0.19152,
    "h": 115.5
  },
  "luminance": 0.89917
}

Semantic roles & 50–950 ramp

primary

#ECFF4F

secondary

#3724CE

accent

#00E619

background

#FFFFFC

surface

#FFFFF4

border

#D7D7CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #ECFF4F

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

Preview Lab → · Contrast checker → · Palette generator →