#ECF37F#ECF37F

#ECF37F is a very light, vivid yellow. Relative luminance 0.835; OKLCH L 93.5% C 0.140 H 111.9°. Best body text is #000000 at 17.69:1 contrast (WCAG AA passes).

Color values

HEX	#ECF37F
RGB	rgb(236, 243, 127)
HSL	hsl(64, 83%, 73%)
HSV	hsv(64, 48%, 95%)
CMYK	cmyk(2.9%, 0%, 47.7%, 4.7%)
CIE-LAB	lab(93.22, -18.22, 54.68)
CIE-LCH	lch(93.22, 57.64, 108.43°)
OKLab	oklab(93.52% -0.0522 0.1299)
OKLCH	oklch(93.52% 0.14 111.9)
XYZ	xyz(70.4747, 83.4677, 32.4729)
Luminance	0.8347 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF37F #867FF3

analogous

#F3C07F #ECF37F #B2F37F

triadic

#ECF37F #7FECF3 #F37FEC

tetradic

#ECF37F #7FF3C0 #867FF3 #F37FB2

square

#ECF37F #7FF3C0 #867FF3 #F37FB2

split-complementary

#ECF37F #7FB2F3 #C07FF3

monochromatic

#D6E215 #E4EE47 #ECF37F #F4F8B7 #FBFCE3

Accessibility & contrast

On white

1.19

#ECF37F on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.69

#ECF37F on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF37F

17.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF37F	#FFFFFF	#000000	##000000
##ECF37F	1.00	1.19	17.69	17.69
#FFFFFF	1.19	1.00	21.00	21.00
#000000	17.69	21.00	1.00	1.00
##000000	17.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEA75

Deuteranopia (green-blind)

#FFED85

Tritanopia (blue-blind)

#F9E7D8

Achromatopsia (no color)

#EBEBEB

Design tokens & code

CSS

--color: #ecf37f;
/* rgb */ color: rgb(236, 243, 127);
/* oklch */ color: oklch(93.5% 0.140 111.9);

Tailwind

colors: {
  custom: {
    50: '#f4f7a6',
    500: '#ecf37f',
    950: '#000000',
  },
}

SCSS

$custom: #ecf37f;
$custom-light: #f4f7a6;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf37f",
  "rgb": {
    "r": 236,
    "g": 243,
    "b": 127
  },
  "hsl": {
    "h": 63.621,
    "s": 82.857,
    "l": 72.549
  },
  "oklch": {
    "l": 0.9352,
    "c": 0.13999,
    "h": 111.9
  },
  "luminance": 0.83466
}

Semantic roles & 50–950 ramp

primary

#ECF37F

secondary

#5048CE

accent

#06DF13

background

#FFFFFC

surface

#FFFEF6

border

#D7D6D0

text

#171710

muted

#858580

Preview Lab

Preview with #ECF37F

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

Preview Lab → · Contrast checker → · Palette generator →