#ECFB66#ECFB66

#ECFB66 is a very light, vivid yellow. Relative luminance 0.878; OKLCH L 94.9% C 0.171 H 114.5°. Best body text is #000000 at 18.56:1 contrast (WCAG AA passes).

Color values

HEX	#ECFB66
RGB	rgb(236, 251, 102)
HSL	hsl(66, 95%, 69%)
HSV	hsv(66, 59%, 98%)
CMYK	cmyk(6%, 0%, 59.4%, 1.6%)
CIE-LAB	lab(95.07, -24.04, 67.83)
CIE-LCH	lch(95.07, 71.96, 109.52°)
OKLab	oklab(94.92% -0.0711 0.1557)
OKLCH	oklch(94.92% 0.171 114.5)
XYZ	xyz(71.4891, 87.7877, 25.7465)
Luminance	0.8779 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECFB66 #7566FB

analogous

#FBBF66 #ECFB66 #A2FB66

triadic

#ECFB66 #66ECFB #FB66EC

tetradic

#ECFB66 #66FBBF #7566FB #FB66A2

square

#ECFB66 #66FBBF #7566FB #FB66A2

split-complementary

#ECFB66 #66A2FB #BF66FB

monochromatic

#CBE106 #E5F92A #ECFB66 #F3FDA2 #FBFEDD

Accessibility & contrast

On white

1.13

#ECFB66 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.56

#ECFB66 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECFB66

18.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECFB66	#FFFFFF	#000000	##000000
##ECFB66	1.00	1.13	18.56	18.56
#FFFFFF	1.13	1.00	21.00	21.00
#000000	18.56	21.00	1.00	1.00
##000000	18.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF055

Deuteranopia (green-blind)

#FFF26F

Tritanopia (blue-blind)

#FAEEDB

Achromatopsia (no color)

#F1F1F1

Design tokens & code

CSS

--color: #ecfb66;
/* rgb */ color: rgb(236, 251, 102);
/* oklch */ color: oklch(94.9% 0.171 114.5);

Tailwind

colors: {
  custom: {
    50: '#f5fc97',
    500: '#ecfb66',
    950: '#000000',
  },
}

SCSS

$custom: #ecfb66;
$custom-light: #f5fc97;
$custom-dark: #000000;

JSON

{
  "hex": "#ecfb66",
  "rgb": {
    "r": 236,
    "g": 251,
    "b": 102
  },
  "hsl": {
    "h": 66.04,
    "s": 94.904,
    "l": 69.216
  },
  "oklch": {
    "l": 0.94921,
    "c": 0.17114,
    "h": 114.5
  },
  "luminance": 0.87787
}

Semantic roles & 50–950 ramp

primary

#ECFB66

secondary

#4130D5

accent

#00E617

background

#FFFFFC

surface

#FFFFF5

border

#D7D7CF

text

#17170E

muted

#85857F

Preview Lab

Preview with #ECFB66

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

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