#ECFB63#ECFB63

#ECFB63 is a very light, vivid yellow. Relative luminance 0.877; OKLCH L 94.9% C 0.173 H 114.5°. Best body text is #000000 at 18.55:1 contrast (WCAG AA passes).

Color values

HEX	#ECFB63
RGB	rgb(236, 251, 99)
HSL	hsl(66, 95%, 69%)
HSV	hsv(66, 61%, 98%)
CMYK	cmyk(6%, 0%, 60.6%, 1.6%)
CIE-LAB	lab(95.05, -24.25, 69.03)
CIE-LCH	lch(95.05, 73.16, 109.35°)
OKLab	oklab(94.89% -0.0719 0.1579)
OKLCH	oklch(94.89% 0.173 114.5)
XYZ	xyz(71.3430, 87.7293, 24.9771)
Luminance	0.8773 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECFB63 #7263FB

analogous

#FBBE63 #ECFB63 #A0FB63

triadic

#ECFB63 #63ECFB #FB63EC

tetradic

#ECFB63 #63FBBE #7263FB #FB63A0

square

#ECFB63 #63FBBE #7263FB #FB63A0

split-complementary

#ECFB63 #63A0FB #BE63FB

monochromatic

#C9DE06 #E5F927 #ECFB63 #F3FD9F #FBFEDA

Accessibility & contrast

On white

1.13

#ECFB63 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.55

#ECFB63 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECFB63

18.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECFB63	#FFFFFF	#000000	##000000
##ECFB63	1.00	1.13	18.55	18.55
#FFFFFF	1.13	1.00	21.00	21.00
#000000	18.55	21.00	1.00	1.00
##000000	18.55	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEF51

Deuteranopia (green-blind)

#FFF26D

Tritanopia (blue-blind)

#FAEDDB

Achromatopsia (no color)

#F1F1F1

Design tokens & code

CSS

--color: #ecfb63;
/* rgb */ color: rgb(236, 251, 99);
/* oklch */ color: oklch(94.9% 0.173 114.5);

Tailwind

colors: {
  custom: {
    50: '#f5fc95',
    500: '#ecfb63',
    950: '#000000',
  },
}

SCSS

$custom: #ecfb63;
$custom-light: #f5fc95;
$custom-dark: #000000;

JSON

{
  "hex": "#ecfb63",
  "rgb": {
    "r": 236,
    "g": 251,
    "b": 99
  },
  "hsl": {
    "h": 65.921,
    "s": 95,
    "l": 68.627
  },
  "oklch": {
    "l": 0.94894,
    "c": 0.17347,
    "h": 114.5
  },
  "luminance": 0.87728
}

Semantic roles & 50–950 ramp

primary

#ECFB63

secondary

#3E2DD5

accent

#00E617

background

#FFFFFC

surface

#FFFFF5

border

#D7D7CF

text

#17170E

muted

#85857F

Preview Lab

Preview with #ECFB63

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

Preview Lab → · Contrast checker → · Palette generator →