#ECF577#ECF577

#ECF577 is a very light, vivid yellow. Relative luminance 0.845; OKLCH L 93.8% C 0.150 H 112.6°. Best body text is #000000 at 17.89:1 contrast (WCAG AA passes).

Color values

HEX	#ECF577
RGB	rgb(236, 245, 119)
HSL	hsl(64, 86%, 71%)
HSV	hsv(64, 51%, 96%)
CMYK	cmyk(3.7%, 0%, 51.4%, 3.9%)
CIE-LAB	lab(93.65, -19.88, 58.87)
CIE-LCH	lch(93.65, 62.13, 108.66°)
OKLab	oklab(93.84% -0.0576 0.1383)
OKLCH	oklch(93.84% 0.15 112.6)
XYZ	xyz(70.5756, 84.4709, 30.0359)
Luminance	0.8447 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF577 #8077F5

analogous

#F5BF77 #ECF577 #ADF577

triadic

#ECF577 #77ECF5 #F577EC

tetradic

#ECF577 #77F5BF #8077F5 #F577AD

square

#ECF577 #77F5BF #8077F5 #F577AD

split-complementary

#ECF577 #77ADF5 #BF77F5

monochromatic

#D2E111 #E4F13E #ECF577 #F4F9B0 #FBFDE2

Accessibility & contrast

On white

1.17

#ECF577 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.89

#ECF577 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF577

17.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF577	#FFFFFF	#000000	##000000
##ECF577	1.00	1.17	17.89	17.89
#FFFFFF	1.17	1.00	21.00	21.00
#000000	17.89	21.00	1.00	1.00
##000000	17.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEB6B

Deuteranopia (green-blind)

#FFEE7E

Tritanopia (blue-blind)

#F9E9D9

Achromatopsia (no color)

#EDEDED

Design tokens & code

CSS

--color: #ecf577;
/* rgb */ color: rgb(236, 245, 119);
/* oklch */ color: oklch(93.8% 0.150 112.6);

Tailwind

colors: {
  custom: {
    50: '#f4f8a1',
    500: '#ecf577',
    950: '#000000',
  },
}

SCSS

$custom: #ecf577;
$custom-light: #f4f8a1;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf577",
  "rgb": {
    "r": 236,
    "g": 245,
    "b": 119
  },
  "hsl": {
    "h": 64.286,
    "s": 86.301,
    "l": 71.373
  },
  "oklch": {
    "l": 0.9384,
    "c": 0.14986,
    "h": 112.6
  },
  "luminance": 0.8447
}

Semantic roles & 50–950 ramp

primary

#ECF577

secondary

#4B40D0

accent

#03E313

background

#FFFFFC

surface

#FFFEF6

border

#D7D6D0

text

#17170F

muted

#858580

Preview Lab

Preview with #ECF577

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

Preview Lab → · Contrast checker → · Palette generator →