#ECF57B#ECF57B

#ECF57B is a very light, vivid yellow. Relative luminance 0.846; OKLCH L 93.9% C 0.146 H 112.7°. Best body text is #000000 at 17.91:1 contrast (WCAG AA passes).

Color values

HEX	#ECF57B
RGB	rgb(236, 245, 123)
HSL	hsl(64, 86%, 72%)
HSV	hsv(64, 50%, 96%)
CMYK	cmyk(3.7%, 0%, 49.8%, 3.9%)
CIE-LAB	lab(93.70, -19.54, 57.10)
CIE-LCH	lch(93.70, 60.35, 108.89°)
OKLab	oklab(93.89% -0.0563 0.1349)
OKLCH	oklch(93.89% 0.146 112.7)
XYZ	xyz(70.8209, 84.5690, 31.3277)
Luminance	0.8457 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF57B #847BF5

analogous

#F5C17B #ECF57B #AFF57B

triadic

#ECF57B #7BECF5 #F57BEC

tetradic

#ECF57B #7BF5C1 #847BF5 #F57BAF

square

#ECF57B #7BF5C1 #847BF5 #F57BAF

split-complementary

#ECF57B #7BAFF5 #C17BF5

monochromatic

#D5E411 #E4F142 #ECF57B #F4F9B4 #FBFDE3

Accessibility & contrast

On white

1.17

#ECF57B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.91

#ECF57B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF57B

17.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF57B	#FFFFFF	#000000	##000000
##ECF57B	1.00	1.17	17.91	17.91
#FFFFFF	1.17	1.00	21.00	21.00
#000000	17.91	21.00	1.00	1.00
##000000	17.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEB70

Deuteranopia (green-blind)

#FFEE81

Tritanopia (blue-blind)

#F9E9D9

Achromatopsia (no color)

#EDEDED

Design tokens & code

CSS

--color: #ecf57b;
/* rgb */ color: rgb(236, 245, 123);
/* oklch */ color: oklch(93.9% 0.146 112.7);

Tailwind

colors: {
  custom: {
    50: '#f4f8a4',
    500: '#ecf57b',
    950: '#000000',
  },
}

SCSS

$custom: #ecf57b;
$custom-light: #f4f8a4;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf57b",
  "rgb": {
    "r": 236,
    "g": 245,
    "b": 123
  },
  "hsl": {
    "h": 64.426,
    "s": 85.915,
    "l": 72.157
  },
  "oklch": {
    "l": 0.93887,
    "c": 0.14613,
    "h": 112.7
  },
  "luminance": 0.84568
}

Semantic roles & 50–950 ramp

primary

#ECF57B

secondary

#4E44D0

accent

#03E214

background

#FFFFFC

surface

#FFFEF6

border

#D7D6D0

text

#17170F

muted

#858580

Preview Lab

Preview with #ECF57B

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

Preview Lab → · Contrast checker → · Palette generator →