#ECF54C#ECF54C

#ECF54C is a very light, vivid yellow. Relative luminance 0.837; OKLCH L 93.4% C 0.183 H 112.5°. Best body text is #000000 at 17.73:1 contrast (WCAG AA passes).

Color values

HEX	#ECF54C
RGB	rgb(236, 245, 76)
HSL	hsl(63, 89%, 63%)
HSV	hsv(63, 69%, 96%)
CMYK	cmyk(3.7%, 0%, 69%, 3.9%)
CIE-LAB	lab(93.30, -22.74, 75.96)
CIE-LCH	lch(93.30, 79.29, 106.66°)
OKLab	oklab(93.45% -0.0699 0.1691)
OKLCH	oklch(93.45% 0.183 112.5)
XYZ	xyz(68.5511, 83.6611, 19.3732)
Luminance	0.8366 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF54C #554CF5

analogous

#F5A94C #ECF54C #98F54C

triadic

#ECF54C #4CECF5 #F54CEC

tetradic

#ECF54C #4CF5A9 #554CF5 #F54C98

square

#ECF54C #4CF5A9 #554CF5 #F54C98

split-complementary

#ECF54C #4C98F5 #A94CF5

monochromatic

#B3BC0B #E6F212 #ECF54C #F2F886 #F8FBC0

Accessibility & contrast

On white

1.18

#ECF54C on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.73

#ECF54C on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF54C

17.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF54C	#FFFFFF	#000000	##000000
##ECF54C	1.00	1.18	17.73	17.73
#FFFFFF	1.18	1.00	21.00	21.00
#000000	17.73	21.00	1.00	1.00
##000000	17.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEA2F

Deuteranopia (green-blind)

#FFEE59

Tritanopia (blue-blind)

#FCE6D4

Achromatopsia (no color)

#ECECEC

Design tokens & code

CSS

--color: #ecf54c;
/* rgb */ color: rgb(236, 245, 76);
/* oklch */ color: oklch(93.4% 0.183 112.5);

Tailwind

colors: {
  custom: {
    50: '#f6f888',
    500: '#ecf54c',
    950: '#000000',
  },
}

SCSS

$custom: #ecf54c;
$custom-light: #f6f888;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf54c",
  "rgb": {
    "r": 236,
    "g": 245,
    "b": 76
  },
  "hsl": {
    "h": 63.195,
    "s": 89.418,
    "l": 62.941
  },
  "oklch": {
    "l": 0.93446,
    "c": 0.183,
    "h": 112.5
  },
  "luminance": 0.83659
}

Semantic roles & 50–950 ramp

primary

#ECF54C

secondary

#332BBA

accent

#00E60C

background

#FFFFFC

surface

#FFFEF4

border

#D7D6CE

text

#18170C

muted

#86857F

Preview Lab

Preview with #ECF54C

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

Preview Lab → · Contrast checker → · Palette generator →