#ECFF53#ECFF53

#ECFF53 is a very light, vivid yellow. Relative luminance 0.900; OKLCH L 95.6% C 0.189 H 115.5°. Best body text is #000000 at 19.00:1 contrast (WCAG AA passes).

Color values

HEX	#ECFF53
RGB	rgb(236, 255, 83)
HSL	hsl(67, 100%, 66%)
HSV	hsv(67, 67%, 100%)
CMYK	cmyk(7.5%, 0%, 67.5%, 0%)
CIE-LAB	lab(95.99, -27.09, 76.15)
CIE-LCH	lch(95.99, 80.83, 109.58°)
OKLab	oklab(95.61% -0.0814 0.1706)
OKLCH	oklch(95.61% 0.189 115.5)
XYZ	xyz(71.9152, 89.9785, 21.7611)
Luminance	0.8998 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECFF53 #6653FF

analogous

#FFBC53 #ECFF53 #96FF53

triadic

#ECFF53 #53ECFF #FF53EC

tetradic

#ECFF53 #53FFBC #6653FF #FF5396

square

#ECFF53 #53FFBC #6653FF #FF5396

split-complementary

#ECFF53 #5396FF #BC53FF

monochromatic

#C0D800 #E5FF16 #ECFF53 #F3FF90 #FAFFCD

Accessibility & contrast

On white

1.11

#ECFF53 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

19.00

#ECFF53 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECFF53

19.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECFF53	#FFFFFF	#000000	##000000
##ECFF53	1.00	1.11	19.00	19.00
#FFFFFF	1.11	1.00	21.00	21.00
#000000	19.00	21.00	1.00	1.00
##000000	19.00	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF238

Deuteranopia (green-blind)

#FFF560

Tritanopia (blue-blind)

#FBF1DD

Achromatopsia (no color)

#F3F3F3

Design tokens & code

CSS

--color: #ecff53;
/* rgb */ color: rgb(236, 255, 83);
/* oklch */ color: oklch(95.6% 0.189 115.5);

Tailwind

colors: {
  custom: {
    50: '#f6ff8d',
    500: '#ecff53',
    950: '#000000',
  },
}

SCSS

$custom: #ecff53;
$custom-light: #f6ff8d;
$custom-dark: #000000;

JSON

{
  "hex": "#ecff53",
  "rgb": {
    "r": 236,
    "g": 255,
    "b": 83
  },
  "hsl": {
    "h": 66.628,
    "s": 100,
    "l": 66.275
  },
  "oklch": {
    "l": 0.95611,
    "c": 0.18903,
    "h": 115.5
  },
  "luminance": 0.89977
}

Semantic roles & 50–950 ramp

primary

#ECFF53

secondary

#3825D1

accent

#00E619

background

#FFFFFC

surface

#FFFFF4

border

#D7D7CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #ECFF53

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

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