#ECFC55#ECFC55

#ECFC55 is a very light, vivid yellow. Relative luminance 0.881; OKLCH L 95.0% C 0.185 H 114.7°. Best body text is #000000 at 18.62:1 contrast (WCAG AA passes).

Color values

HEX	#ECFC55
RGB	rgb(236, 252, 85)
HSL	hsl(66, 97%, 66%)
HSV	hsv(66, 66%, 99%)
CMYK	cmyk(6.3%, 0%, 66.3%, 1.2%)
CIE-LAB	lab(95.21, -25.58, 74.63)
CIE-LCH	lch(95.21, 78.89, 108.92°)
OKLab	oklab(94.99% -0.077 0.1677)
OKLCH	oklch(94.99% 0.185 114.7)
XYZ	xyz(71.0440, 88.1108, 21.8571)
Luminance	0.8811 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECFC55 #6555FC

analogous

#FCB955 #ECFC55 #98FC55

triadic

#ECFC55 #55ECFC #FC55EC

tetradic

#ECFC55 #55FCB9 #6555FC #FC5598

square

#ECFC55 #55FCB9 #6555FC #FC5598

split-complementary

#ECFC55 #5598FC #B955FC

monochromatic

#BFD304 #E5FB19 #ECFC55 #F3FD91 #F9FECD

Accessibility & contrast

On white

1.13

#ECFC55 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.62

#ECFC55 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECFC55

18.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECFC55	#FFFFFF	#000000	##000000
##ECFC55	1.00	1.13	18.62	18.62
#FFFFFF	1.13	1.00	21.00	21.00
#000000	18.62	21.00	1.00	1.00
##000000	18.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF03C

Deuteranopia (green-blind)

#FFF361

Tritanopia (blue-blind)

#FBEEDA

Achromatopsia (no color)

#F1F1F1

Design tokens & code

CSS

--color: #ecfc55;
/* rgb */ color: rgb(236, 252, 85);
/* oklch */ color: oklch(95.0% 0.185 114.7);

Tailwind

colors: {
  custom: {
    50: '#f6fd8d',
    500: '#ecfc55',
    950: '#000000',
  },
}

SCSS

$custom: #ecfc55;
$custom-light: #f6fd8d;
$custom-dark: #000000;

JSON

{
  "hex": "#ecfc55",
  "rgb": {
    "r": 236,
    "g": 252,
    "b": 85
  },
  "hsl": {
    "h": 65.749,
    "s": 96.532,
    "l": 66.078
  },
  "oklch": {
    "l": 0.94989,
    "c": 0.18455,
    "h": 114.7
  },
  "luminance": 0.8811
}

Semantic roles & 50–950 ramp

primary

#ECFC55

secondary

#3828CD

accent

#00E616

background

#FFFFFC

surface

#FFFFF4

border

#D7D7CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #ECFC55

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

Preview Lab → · Contrast checker → · Palette generator →