#ECF37C#ECF37C

#ECF37C is a very light, vivid yellow. Relative luminance 0.834; OKLCH L 93.5% C 0.143 H 111.9°. Best body text is #000000 at 17.68:1 contrast (WCAG AA passes).

Color values

HEX	#ECF37C
RGB	rgb(236, 243, 124)
HSL	hsl(64, 83%, 72%)
HSV	hsv(64, 49%, 95%)
CMYK	cmyk(2.9%, 0%, 49%, 4.7%)
CIE-LAB	lab(93.19, -18.49, 56.03)
CIE-LCH	lch(93.19, 59.00, 108.26°)
OKLab	oklab(93.48% -0.0532 0.1326)
OKLCH	oklch(93.48% 0.143 111.9)
XYZ	xyz(70.2821, 83.3906, 31.4585)
Luminance	0.8339 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF37C #837CF3

analogous

#F3BE7C #ECF37C #B1F37C

triadic

#ECF37C #7CECF3 #F37CEC

tetradic

#ECF37C #7CF3BE #837CF3 #F37CB1

square

#ECF37C #7CF3BE #837CF3 #F37CB1

split-complementary

#ECF37C #7CB1F3 #BE7CF3

monochromatic

#D4E015 #E4EE44 #ECF37C #F4F8B4 #FBFCE3

Accessibility & contrast

On white

1.19

#ECF37C on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.68

#ECF37C on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF37C

17.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF37C	#FFFFFF	#000000	##000000
##ECF37C	1.00	1.19	17.68	17.68
#FFFFFF	1.19	1.00	21.00	21.00
#000000	17.68	21.00	1.00	1.00
##000000	17.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEA71

Deuteranopia (green-blind)

#FFED82

Tritanopia (blue-blind)

#F9E7D8

Achromatopsia (no color)

#EBEBEB

Design tokens & code

CSS

--color: #ecf37c;
/* rgb */ color: rgb(236, 243, 124);
/* oklch */ color: oklch(93.5% 0.143 111.9);

Tailwind

colors: {
  custom: {
    50: '#f4f6a5',
    500: '#ecf37c',
    950: '#000000',
  },
}

SCSS

$custom: #ecf37c;
$custom-light: #f4f6a5;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf37c",
  "rgb": {
    "r": 236,
    "g": 243,
    "b": 124
  },
  "hsl": {
    "h": 63.529,
    "s": 83.217,
    "l": 71.961
  },
  "oklch": {
    "l": 0.93482,
    "c": 0.14289,
    "h": 111.9
  },
  "luminance": 0.83389
}

Semantic roles & 50–950 ramp

primary

#ECF37C

secondary

#4D45CE

accent

#06E013

background

#FFFFFC

surface

#FFFEF6

border

#D7D6D0

text

#17170F

muted

#858580

Preview Lab

Preview with #ECF37C

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

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