#ECF58F#ECF58F

#ECF58F is a very light, vivid yellow. Relative luminance 0.851; OKLCH L 94.2% C 0.126 H 112.9°. Best body text is #000000 at 18.02:1 contrast (WCAG AA passes).

Color values

HEX	#ECF58F
RGB	rgb(236, 245, 143)
HSL	hsl(65, 84%, 76%)
HSV	hsv(65, 42%, 96%)
CMYK	cmyk(3.7%, 0%, 41.6%, 3.9%)
CIE-LAB	lab(93.94, -17.64, 47.99)
CIE-LCH	lch(93.94, 51.13, 110.18°)
OKLab	oklab(94.16% -0.0491 0.1161)
OKLCH	oklch(94.16% 0.126 112.9)
XYZ	xyz(72.2032, 85.1219, 38.6078)
Luminance	0.8512 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF58F #988FF5

analogous

#F5CB8F #ECF58F #B9F58F

triadic

#ECF58F #8FECF5 #F58FEC

tetradic

#ECF58F #8FF5CB #988FF5 #F58FB9

square

#ECF58F #8FF5CB #988FF5 #F58FB9

split-complementary

#ECF58F #8FB9F5 #CB8FF5

monochromatic

#D9EB1F #E2F057 #ECF58F #F6FAC7 #FAFCE3

Accessibility & contrast

On white

1.17

#ECF58F on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.02

#ECF58F on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF58F

18.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF58F	#FFFFFF	#000000	##000000
##ECF58F	1.00	1.17	18.02	18.02
#FFFFFF	1.17	1.00	21.00	21.00
#000000	18.02	21.00	1.00	1.00
##000000	18.02	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEC87

Deuteranopia (green-blind)

#FFEF94

Tritanopia (blue-blind)

#F7EADC

Achromatopsia (no color)

#EEEEEE

Design tokens & code

CSS

--color: #ecf58f;
/* rgb */ color: rgb(236, 245, 143);
/* oklch */ color: oklch(94.2% 0.126 112.9);

Tailwind

colors: {
  custom: {
    50: '#f3f8b1',
    500: '#ecf58f',
    950: '#000000',
  },
}

SCSS

$custom: #ecf58f;
$custom-light: #f3f8b1;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf58f",
  "rgb": {
    "r": 236,
    "g": 245,
    "b": 143
  },
  "hsl": {
    "h": 65.294,
    "s": 83.607,
    "l": 76.078
  },
  "oklch": {
    "l": 0.94155,
    "c": 0.12608,
    "h": 112.9
  },
  "luminance": 0.85121
}

Semantic roles & 50–950 ramp

primary

#ECF58F

secondary

#6156D3

accent

#05E019

background

#FFFFFD

surface

#FEFEF8

border

#D6D6D1

text

#171711

muted

#858581

Preview Lab

Preview with #ECF58F

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

Preview Lab → · Contrast checker → · Palette generator →