#ECFF55#ECFF55

#ECFF55 is a very light, vivid yellow. Relative luminance 0.900; OKLCH L 95.6% C 0.188 H 115.5°. Best body text is #000000 at 19.00:1 contrast (WCAG AA passes).

Color values

HEX	#ECFF55
RGB	rgb(236, 255, 85)
HSL	hsl(67, 100%, 67%)
HSV	hsv(67, 67%, 100%)
CMYK	cmyk(7.5%, 0%, 66.7%, 0%)
CIE-LAB	lab(96.00, -26.98, 75.44)
CIE-LCH	lch(96.00, 80.12, 109.68°)
OKLab	oklab(95.63% -0.0809 0.1694)
OKLCH	oklch(95.63% 0.188 115.5)
XYZ	xyz(71.9935, 90.0099, 22.1737)
Luminance	0.9001 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECFF55 #6855FF

analogous

#FFBD55 #ECFF55 #97FF55

triadic

#ECFF55 #55ECFF #FF55EC

tetradic

#ECFF55 #55FFBD #6855FF #FF5597

square

#ECFF55 #55FFBD #6855FF #FF5597

split-complementary

#ECFF55 #5597FF #BD55FF

monochromatic

#C1DA00 #E5FF18 #ECFF55 #F3FF92 #FAFFCF

Accessibility & contrast

On white

1.11

#ECFF55 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

19.00

#ECFF55 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECFF55

19.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECFF55	#FFFFFF	#000000	##000000
##ECFF55	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)

#FFF23B

Deuteranopia (green-blind)

#FFF562

Tritanopia (blue-blind)

#FAF1DD

Achromatopsia (no color)

#F3F3F3

Design tokens & code

CSS

--color: #ecff55;
/* rgb */ color: rgb(236, 255, 85);
/* oklch */ color: oklch(95.6% 0.188 115.5);

Tailwind

colors: {
  custom: {
    50: '#f6ff8e',
    500: '#ecff55',
    950: '#000000',
  },
}

SCSS

$custom: #ecff55;
$custom-light: #f6ff8e;
$custom-dark: #000000;

JSON

{
  "hex": "#ecff55",
  "rgb": {
    "r": 236,
    "g": 255,
    "b": 85
  },
  "hsl": {
    "h": 66.706,
    "s": 100,
    "l": 66.667
  },
  "oklch": {
    "l": 0.95626,
    "c": 0.18775,
    "h": 115.5
  },
  "luminance": 0.90009
}

Semantic roles & 50–950 ramp

primary

#ECFF55

secondary

#3925D3

accent

#00E61A

background

#FFFFFC

surface

#FFFFF4

border

#D7D7CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #ECFF55

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

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