#ECF58B#ECF58B

#ECF58B is a very light, vivid yellow. Relative luminance 0.850; OKLCH L 94.1% C 0.130 H 112.9°. Best body text is #000000 at 18.00:1 contrast (WCAG AA passes).

Color values

HEX	#ECF58B
RGB	rgb(236, 245, 139)
HSL	hsl(65, 84%, 75%)
HSV	hsv(65, 43%, 96%)
CMYK	cmyk(3.7%, 0%, 43.3%, 3.9%)
CIE-LAB	lab(93.88, -18.05, 49.84)
CIE-LCH	lch(93.88, 53.01, 109.90°)
OKLab	oklab(94.1% -0.0506 0.12)
OKLCH	oklch(94.1% 0.13 112.9)
XYZ	xyz(71.9056, 85.0029, 37.0404)
Luminance	0.8500 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF58B #948BF5

analogous

#F5C98B #ECF58B #B7F58B

triadic

#ECF58B #8BECF5 #F58BEC

tetradic

#ECF58B #8BF5C9 #948BF5 #F58BB7

square

#ECF58B #8BF5C9 #948BF5 #F58BB7

split-complementary

#ECF58B #8BB7F5 #C98BF5

monochromatic

#DAEB1A #E3F053 #ECF58B #F5FAC3 #FAFDE3

Accessibility & contrast

On white

1.17

#ECF58B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.00

#ECF58B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF58B

18.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF58B	#FFFFFF	#000000	##000000
##ECF58B	1.00	1.17	18.00	18.00
#FFFFFF	1.17	1.00	21.00	21.00
#000000	18.00	21.00	1.00	1.00
##000000	18.00	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEC82

Deuteranopia (green-blind)

#FFEF90

Tritanopia (blue-blind)

#F8EADC

Achromatopsia (no color)

#EDEDED

Design tokens & code

CSS

--color: #ecf58b;
/* rgb */ color: rgb(236, 245, 139);
/* oklch */ color: oklch(94.1% 0.130 112.9);

Tailwind

colors: {
  custom: {
    50: '#f4f8af',
    500: '#ecf58b',
    950: '#000000',
  },
}

SCSS

$custom: #ecf58b;
$custom-light: #f4f8af;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf58b",
  "rgb": {
    "r": 236,
    "g": 245,
    "b": 139
  },
  "hsl": {
    "h": 65.094,
    "s": 84.127,
    "l": 75.294
  },
  "oklch": {
    "l": 0.94097,
    "c": 0.13027,
    "h": 112.9
  },
  "luminance": 0.85002
}

Semantic roles & 50–950 ramp

primary

#ECF58B

secondary

#5D52D2

accent

#05E118

background

#FFFFFD

surface

#FEFEF7

border

#D6D6D0

text

#171710

muted

#858581

Preview Lab

Preview with #ECF58B

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

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