#ECF257#ECF257

#ECF257 is a very light, vivid yellow. Relative luminance 0.820; OKLCH L 92.9% C 0.173 H 111.5°. Best body text is #000000 at 17.41:1 contrast (WCAG AA passes).

Color values

HEX	#ECF257
RGB	rgb(236, 242, 87)
HSL	hsl(62, 86%, 65%)
HSV	hsv(62, 64%, 95%)
CMYK	cmyk(2.5%, 0%, 64%, 5.1%)
CIE-LAB	lab(92.59, -20.71, 71.19)
CIE-LCH	lch(92.59, 74.14, 106.22°)
OKLab	oklab(92.9% -0.0632 0.1608)
OKLCH	oklch(92.9% 0.173 111.5)
XYZ	xyz(68.0665, 82.0269, 21.2622)
Luminance	0.8203 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF257 #5D57F2

analogous

#F2AB57 #ECF257 #9EF257

triadic

#ECF257 #57ECF2 #F257EC

tetradic

#ECF257 #57F2AB #5D57F2 #F2579E

square

#ECF257 #57F2AB #5D57F2 #F2579E

split-complementary

#ECF257 #579EF2 #AB57F2

monochromatic

#B9C00F #E6EE1E #ECF257 #F2F690 #F9FBC9

Accessibility & contrast

On white

1.21

#ECF257 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.41

#ECF257 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF257

17.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF257	#FFFFFF	#000000	##000000
##ECF257	1.00	1.21	17.41	17.41
#FFFFFF	1.21	1.00	21.00	21.00
#000000	17.41	21.00	1.00	1.00
##000000	17.41	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFE842

Deuteranopia (green-blind)

#FFEC61

Tritanopia (blue-blind)

#FBE4D2

Achromatopsia (no color)

#EAEAEA

Design tokens & code

CSS

--color: #ecf257;
/* rgb */ color: rgb(236, 242, 87);
/* oklch */ color: oklch(92.9% 0.173 111.5);

Tailwind

colors: {
  custom: {
    50: '#f5f68e',
    500: '#ecf257',
    950: '#000000',
  },
}

SCSS

$custom: #ecf257;
$custom-light: #f5f68e;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf257",
  "rgb": {
    "r": 236,
    "g": 242,
    "b": 87
  },
  "hsl": {
    "h": 62.323,
    "s": 85.635,
    "l": 64.51
  },
  "oklch": {
    "l": 0.92896,
    "c": 0.17272,
    "h": 111.5
  },
  "luminance": 0.82025
}

Semantic roles & 50–950 ramp

primary

#ECF257

secondary

#3530BE

accent

#03E20C

background

#FFFFFC

surface

#FFFEF4

border

#D7D6CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #ECF257

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

Preview Lab → · Contrast checker → · Palette generator →