#ECFC4B#ECFC4B

#ECFC4B is a very light, vivid yellow. Relative luminance 0.880; OKLCH L 94.9% C 0.191 H 114.6°. Best body text is #000000 at 18.59:1 contrast (WCAG AA passes).

Color values

HEX	#ECFC4B
RGB	rgb(236, 252, 75)
HSL	hsl(65, 97%, 64%)
HSV	hsv(65, 70%, 99%)
CMYK	cmyk(6.3%, 0%, 70.2%, 1.2%)
CIE-LAB	lab(95.15, -26.10, 78.11)
CIE-LCH	lch(95.15, 82.35, 108.47°)
OKLab	oklab(94.92% -0.0794 0.1735)
OKLCH	oklch(94.92% 0.191 114.6)
XYZ	xyz(70.6744, 87.9630, 19.9108)
Luminance	0.8796 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECFC4B #5B4BFC

analogous

#FCB44B #ECFC4B #94FC4B

triadic

#ECFC4B #4BECFC #FC4BEC

tetradic

#ECFC4B #4BFCB4 #5B4BFC #FC4B94

square

#ECFC4B #4BFCB4 #5B4BFC #FC4B94

split-complementary

#ECFC4B #4B94FC #B44BFC

monochromatic

#B7C903 #E6FB0F #ECFC4B #F2FD87 #F9FEC3

Accessibility & contrast

On white

1.13

#ECFC4B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.59

#ECFC4B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECFC4B

18.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECFC4B	#FFFFFF	#000000	##000000
##ECFC4B	1.00	1.13	18.59	18.59
#FFFFFF	1.13	1.00	21.00	21.00
#000000	18.59	21.00	1.00	1.00
##000000	18.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF02B

Deuteranopia (green-blind)

#FFF359

Tritanopia (blue-blind)

#FBEDDA

Achromatopsia (no color)

#F1F1F1

Design tokens & code

CSS

--color: #ecfc4b;
/* rgb */ color: rgb(236, 252, 75);
/* oklch */ color: oklch(94.9% 0.191 114.6);

Tailwind

colors: {
  custom: {
    50: '#f6fd88',
    500: '#ecfc4b',
    950: '#000000',
  },
}

SCSS

$custom: #ecfc4b;
$custom-light: #f6fd88;
$custom-dark: #000000;

JSON

{
  "hex": "#ecfc4b",
  "rgb": {
    "r": 236,
    "g": 252,
    "b": 75
  },
  "hsl": {
    "h": 65.424,
    "s": 96.721,
    "l": 64.118
  },
  "oklch": {
    "l": 0.9492,
    "c": 0.19077,
    "h": 114.6
  },
  "luminance": 0.87962
}

Semantic roles & 50–950 ramp

primary

#ECFC4B

secondary

#3426C5

accent

#00E615

background

#FFFFFC

surface

#FFFFF4

border

#D7D7CE

text

#18170C

muted

#86857F

Preview Lab

Preview with #ECFC4B

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

Preview Lab → · Contrast checker → · Palette generator →