#ECFF4E#ECFF4E

#ECFF4E 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	#ECFF4E
RGB	rgb(236, 255, 78)
HSL	hsl(66, 100%, 65%)
HSV	hsv(66, 69%, 100%)
CMYK	cmyk(7.5%, 0%, 69.4%, 0%)
CIE-LAB	lab(95.96, -27.35, 77.88)
CIE-LCH	lch(95.96, 82.54, 109.35°)
OKLab	oklab(95.58% -0.0826 0.1735)
OKLCH	oklch(95.58% 0.192 115.5)
XYZ	xyz(71.7291, 89.9041, 20.7809)
Luminance	0.8990 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECFF4E #614EFF

analogous

#FFBA4E #ECFF4E #93FF4E

triadic

#ECFF4E #4EECFF #FF4EEC

tetradic

#ECFF4E #4EFFBA #614EFF #FF4E93

square

#ECFF4E #4EFFBA #614EFF #FF4E93

split-complementary

#ECFF4E #4E93FF #BA4EFF

monochromatic

#BCD300 #E5FF11 #ECFF4E #F3FF8B #F9FFC8

Accessibility & contrast

On white

1.11

#ECFF4E on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.98

#ECFF4E on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECFF4E

18.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECFF4E	#FFFFFF	#000000	##000000
##ECFF4E	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)

#FFF22F

Deuteranopia (green-blind)

#FFF55C

Tritanopia (blue-blind)

#FBF1DC

Achromatopsia (no color)

#F3F3F3

Design tokens & code

CSS

--color: #ecff4e;
/* rgb */ color: rgb(236, 255, 78);
/* oklch */ color: oklch(95.6% 0.192 115.5);

Tailwind

colors: {
  custom: {
    50: '#f6ff8a',
    500: '#ecff4e',
    950: '#000000',
  },
}

SCSS

$custom: #ecff4e;
$custom-light: #f6ff8a;
$custom-dark: #000000;

JSON

{
  "hex": "#ecff4e",
  "rgb": {
    "r": 236,
    "g": 255,
    "b": 78
  },
  "hsl": {
    "h": 66.441,
    "s": 100,
    "l": 65.294
  },
  "oklch": {
    "l": 0.95576,
    "c": 0.19213,
    "h": 115.5
  },
  "luminance": 0.89903
}

Semantic roles & 50–950 ramp

primary

#ECFF4E

secondary

#3624CD

accent

#00E619

background

#FFFFFC

surface

#FFFFF4

border

#D7D7CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #ECFF4E

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

Preview Lab → · Contrast checker → · Palette generator →